SOOOO I've always used full synthetic way before most vehicles started recommending it from the manufacturer. I've ran mobile 1, royal purple, and a few others. When we got our 2007 Mazda 3 all of the records/receipts showed conventional Castrol was used. I've stuck with it to see how it do... I've increased the weight "one step" because we live in a hotter than average climate but we just hit 290k miles with not major issues... my average MPG is 31.x and I typically do 10 over the speed limit (so it could definitely be improved).I change it myself every 5k miles. I think the frequency is more important than the quality with oil. I'd rather have super tech every 3k than mobile 1 every 10k. I think if you stick with any major brand, use a good filter, and change it regularly you'll be fine.
Owner reviews for engine oil
Only used Motul 300V 5w30 or 5w40 since I bought the car new in 2009. Today I'm on 178k kilometers and still on the first chain and chain tensioner. No rattle, no oil consumption or what so ever.
After using Castrol for \~16 years I switched reluctantly to Liquid Moly, I say reluctant because the Castrol was so highly suggested to use.
Result is that while using Castrol all of those years I would have to add 1/2 to 1 quart of oil in between 5-6K oil changes. I drive the car hard and was told mild oil burning is normal for the S54 engine.
I have been using the Liquid Moly for the last few years and I do not burn any oil in between changes, and my engine oil runs at a lower temperature then it ever has in the past.
Redline 10w30 full synthetic if I know I'm going to beat the piss out of it for the next 5k miles (think autocross or mountain runs), otherwise I use Honda 10w30 full synthetic.
Mobil1…been running it for a decade ap1 supercharged S2K…flawless
AP1 164k miles using Castro edge high mileage 10w-30. In my experience it does not burn as much oil as Mobil 1
Mobil 1 full synthetic. Been using it in all of my cars for years. No issues with burning oil or anything.
I’ll probably get downvoted for this, but since my SS isn’t under warranty anymore, I use the euro stuff. Good enough for Porsche, good enough for my Chevy.
I got a good deal on some amsoil and I love it, pricey but worth it tbh!
Also going to switch from Motul to LiquiMoly and see if I can tell a difference.
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