digitaloutsider Posted May 23, 2008 Report Share Posted May 23, 2008 Look at the certifications on the bottle. It literally does not adhere to anything but API standards. Quote Link to comment Share on other sites More sharing options...
ns87 Posted May 23, 2008 Report Share Posted May 23, 2008 The longest I've gone without changing my oil on the regal was 4500 miles with fully synthetic, and after an oil change, I noticed the car would have a periodic rough idle while stopped, which I could feel in the brake pedal and steering wheel. Whether or not that's attributed to the oil change is beyond me. I've experienced something very similar! So how'd you fix it? One oil change later and its still happening... Maybe I should dump a canister of seafoam in the crank case before I change my oil... I just change my oil and it goes away. I made sure I wasn't low on oil, and let it be. Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted May 23, 2008 Report Share Posted May 23, 2008 The longest I've gone without changing my oil on the regal was 4500 miles with fully synthetic, and after an oil change, I noticed the car would have a periodic rough idle while stopped, which I could feel in the brake pedal and steering wheel. Whether or not that's attributed to the oil change is beyond me. I've experienced something very similar! So how'd you fix it? One oil change later and its still happening... Maybe I should dump a canister of seafoam in the crank case before I change my oil... I just change my oil and it goes away. I made sure I wasn't low on oil, and let it be. Hmm, then I'm hoping this will go away by the time I do my next oil change, which is coming up pretty soon. Quote Link to comment Share on other sites More sharing options...
ns87 Posted May 25, 2008 Report Share Posted May 25, 2008 let me know if it does, I'm curious Quote Link to comment Share on other sites More sharing options...
red95cutlass Posted May 29, 2008 Author Report Share Posted May 29, 2008 RP website says dont use it in a brand new engine. Wait until 2000 -3000 mile mark. Quote Link to comment Share on other sites More sharing options...
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