2nd time coming here and the service is fantastic. They close at 5, I got in 4:45, they still let…read moreme in no issue. They say 15 minutes but in reality, look at it as 20 minutes for your oil change in total (I timed it) and then potentially 15-20 minutes in addition if there's an existing car In front of you already too. Make sure to get the Groupon to save $20ish. You still have to pay recycling fee + tax but still worth it.

I had a good experience at Valvoline Instant Oil Change on Monument Boulevard in Concord. I really…read moreappreciated that they accepted and honored my Groupon, which brought the price down from around $120 to about $68. That made a big difference, and I give them credit for actually standing behind the promotion and making the process easy. The team was professional, efficient, and very thorough. They checked everything carefully, communicated what they were doing, and I felt like they did a solid job on my synthetic oil change. The only reason I'm giving four stars instead of five is the constant upselling. I understand that's part of the business, but it felt like every few minutes there was another recommendation -- add this, change that, buy this service, try this product. Since I was already getting a good deal through the Groupon, it felt like they were really trying to make up the difference with add-ons. I had to say "no" several times before it finally stuck that I was only there for the oil change. Overall, though, I appreciate the quality of the work, the professionalism, and the fact that they honored the Groupon without any hassle. I'd come back again -- I'd just prefer a little less pressure on the extra services.

Heard about this shop through an acquaintance in a Facebook car group I'm a part of. The way that…read morethe guy described this shop instantly had me wanting to book service here; it was described as very meticulous, fair, and thorough. That's exactly the kind of service that I like to do when I work on my vehicles myself. I needed to have the brakes flushed on my 2019 Jeep Wrangler. The price that was quoted was less than the dealership wanted, and was very fair. The owner was very friendly and knowledgeable. He was able to drop me off and pick me up from the local coffee shop, where I was able to work while the service was being done. When we got back to the shop, he showed me the brake test that was performed, as well as showed me some of the other cool vehicles in the shop. I am already in the process of booking a service for another one of my vehicles here, and see no reason for me to look anywhere else in the foreseeable future.

Honest work, great communication. I noticed leaking fluid from my BMW and the dealership quoted me…read morean insane amount for many things that didn't make sense I needed repaired yet for a newer car. Brought it into this shop (best to stop by, they don't always pick up the phone # listed online but is great once you talk to Bobby) to get it assessed. Very professional- and they looked at the issue, gave me a fair quote, and finished on time. Even showed me the parts cracked and didn't charge me more of an oil cap that wasn't fitting right. 10/10! Glad to find a local shop in Martinez

Chris is the owner and amazing mechanic.... Had timing…read morechain needed to be replaced... excellent job

Chris and the guys at Monument Auto Masters are excellent!!…read more Great service, great price! They have saved my ass numerous times.

I've been a customer for years and have never been disappointed. Great service and prices. They go…read moreabove and beyond. Highly recommend them.

Skilled repair is a vanishing art. The craftsmen at DeCarlo's have done high quality work on my…read moreToyota and Ford trucks and they charge a reasonable price. Terry always keeps his costumers in the loop and never does more than the service requested without calling and talking with the car owner. DeCarlo's is the only mechanic in Martinez that I will take my vehicle to.

Absolutely terrible, I brought my car here a long time ago for a slipping tranny and Son swore it…read morewas fine so I took it to AAMCO and they said the tranny was so bad they were surprised I made it to them. My family member recently brought their car there despite me saying not to and now there are several new issues with her car. On top of the new issues Son filled her tires to 50 psi when it clearly states on the tire and the door it's only supposed to be at 35 psi. I think he's too overworked to really take his time to do a good job. Do yourself a favor and don't go here.

I had the best experience with Martinez Auto Tech. I needed to do general maintenance for my Subaru…read moreCrosstrek at 60,000 miles. I'd been putting it off because finding the right shop (quality service, fair prices, honest recommendations, and not condescending) is so daunting. I enlisted my Dad who owns a dealership in LA to help me find the right Bay Area auto shop. He took the task very seriously and talked to 5+ shops. When he spoke with Martinez Auto Tech, he could instantly tell they were knowledgeable and they gave feedback on what was and wan't necessary for 60,000 mile service. Their prices beat out other local shops as well. When I dropped the car off they were able to take care of everything in one day (spark plugs, oil change, CVT drain and fill, brake flush, rear and front trans axel fluid) for under $1,000. To top it off they were so kind and happy to answer questions along the way. I never felt uncomfortable, unlikely majority of shops I've been to solo as a woman. 5 days later, our VW Golf died and wouldn't restart. I had it towed to their shop while they were closed over the weekend. I called them Monday morning to see if they could figure out what was going on. They were so accommodating and happy to squeeze me in without an appointment. They figured out it was an issue with the alternator and had the car back and running before the day was over. They didn't even charge me for charging up the car since I had just done my Subaru service. I really appreciate a small, local business that values their customers. This was such an act of kindness that I won't forget. I'll never service my cars elsewhere as long as I live in this area and will always recommend them to anyone - especially if you aren't a car expert and need honest guidance and recommendations. Thank you so much Martinez Auto Tech!

I had to get new tires for my truck and so I went around to get a few different estimates. After…read moretalking with Erik, he was able to find me the best deal for my truck, which requires a larger size tire. During the process of swapping out the old tires for the new, 3 out of 4 of my wheels got chewed up a little. Erik called me down to take a look and offered me a few different options to make sure they corrected the mistake. The wheels I had on my truck were extremely nice (I liked them) but they were discontinued. So we tried to see if we could get someone to repair the scratches/gouges but unfortunately they would look the same. The would end up being painted completely black, losing that milled look. After a couple weeks I called Erik back and suggested we have to go another route, which would be for them to purchase new wheels for me. And so he did. (Not the same, but some very nice ones). They took care of replacing my old wheels with the new ones and everything looked ok. A day or 2 later Erik called me because he noticed something I didn't. The lug nuts. My previous wheels had a cap over the lugs so you didn't see them. However, my new wheels don't have that, so you can see the lug nuts and they didn't look that good up against the black wheels. Erik called and offered to order me some black lug nuts to soften the appearance on my new wheels. All in all, Erik went above and beyond to take care of me and make sure all was done correctly. Great guys. Great to work with and over all i highly recommend this place.

Reached out for a quote via email and Erik delivered about 24 hrs later. They were able to get the…read moretires in same day and knocked it out in an hour. Overall good experience and fair pricing. Convenient location with food and beer across the street!

I've taken my car here a handful of times for oil changes and different services. Ive asked for a…read morequotes on other services and they've been very helpful in the past. Really quick oil change service and honest and friendly staff!!

I've been going to Clayton Auto Quality Care for years for oil changes, and they've always taken…read moregreat care of my vehicles. The work is consistently high quality, done right the first time, and never rushed. They're honest, knowledgeable, and straightforward--Highly recommend Clayton Auto Quality Care to anyone looking for reliable, professional automotive service.

tl;dr: Phil at Morello replaced my catalytic converter incorrectly, and I spent almost an entire…read morestressful year trying to get him to resolve this to no avail, and ultimately discovered he had been lying to me on multiple occasions, and his shop does not have a valid California BAR license. Another shop had to completely re-do the work. I've been going to Morello for small jobs like oil changes for a number of years. In May 2024 my catalytic converter was stolen from my 2006 Honda Accord. I took it to Morello to replace the converter and O2 sensors. He replaced it with an aftermarket converter. Soon after it was installed, my check engine light (CEL) came on, which started a long saga trying to resolve it. Over the course of the following months, I dropped off my car many times. He first replaced the O2 sensors, which did not resolve the problem. Then a few months later, he tried replacing the catalytic converter, which also did not work. Then he spent several months promising that he was working with the BAR to certify my catalytic converter even though the CEL was still on. He was never able to resolve this after several months of asking him for an update. At this point I took the car to another shop for a second opinion (March 2025). They quickly identified that the catalytic converter that was installed was not the correct one for my engine family. I went back to Morello, requesting that he remedy the situation since he never installed the correct converter to begin with. I urged him to install a Honda OEM converter that we could be 100% sure to work, since at this point he had been unable to resolve this issue for 11 months. He promised he would do this. Once he assured me had the Honda catalytic converter in the shop, I dropped off the car on March 20, and picked up the car on March 21. No one was at the shop when I came to pick up the car, I had to get the keys from the gas station owner. However, the CEL was still lit. I also went under the car and discovered that there was no difference in the catalytic converter, it was still the exact same aftermarket catalytic converter. This kicked off another month's worth of poor communication and excuses. I eventually finally arranged to be at the shop to do the work on April 18; Phil once again promised me that he had the Honda OEM converter on hand and that it would be finished that day. Given the poor communication and problems resolving the issue, I decided to stay at the shop to confirm the correct converter was installed, and verify the completion of work. However, Phil refused to come to the shop and work on it while I was at the shop. He required that I leave the car and return at the end of the day. Over the course of the day, it became clear that he had lied to me - he did not have the Honda OEM part on hand. In fact, he arranged mid-day for another aftermarket converter to be delivered (the *exact same model I had on my car*), which I declined to install. Ultimately, I spent 6 hours at the shop, and Phil never showed up. He never gave me any paperwork, despite my requests for it. He was never at the shop when I came to pick up the car (he always had me pick up after hours), so I would call him to request the paperwork be left with the car. He always made promises, but never followed through. In the end, I took the car to another shop for an additional opinion and to re-do the work with a Honda OEM catalytic converter. Their evaluation of the work that was done by Morello was "a butcher job" and that there were multiple problems with the work: "I'll put it this way, I've never seen anyone do it like that before". The welds were done poorly, a flex bracket was missing, and the pipes used were the wrong size. In the end, I needed a new catalytic converter, flex bracket, and entirely new exhaust pipe. One additional comment about communication: A lot of times Phil does not reply to text messages or answer the phone. I often had to try calling multiple times throughout multiple days to get a hold of him. Oftentimes, he would tell me things like "I need to check with {something/someone}, I'll call you back in 15 minutes", but he would never keep his word to call me back, requiring me to continuously call back to try and reach him. I did not appreciate the feeling of micromanaging the project due to his poor communication. By contrast the other shop was able to resolve this in a single day, over 3 short phone calls - one call to schedule the work, one to update me on the diagnosis and the work required, and one final call to inform me of completion. I made a complaint to the Bureau of Automotive Repair, and discovered in the process that his license has been delinquent since 2023. At this point I cannot recommend this shop to anyone. It's clear Phil has not been working in good faith to help me but has lied to me on multiple occasions.

Used to come when Phil was here. Apparently this place is under "new management" called on 12/22…read moreasking if they were open 12/26. Set up an appt for oil change 12/26 at 7:30 am. Showed up at 7:30. Place was closed up. By 740 no one showed up I inquired inside the gas station if he knew if they were open or not, he told me they are "sometimes 10 or 15 minutes late" no one showed up and I left by 8 AM. there was another person that came, who was obviously expecting them to be open as well. Not a great start for this new management won't be coming here anymore.