Owner reviews for engine oil

I've been running 10W-40 Repsol Smarter full synthetic oil (motorcycle oil) in my '09 WRX STI for the last 10 years — I buy it in bulk, lol. No excess carbon deposits, and it still runs smooth with 238,000 miles on it.

I run 5w40 motul because of upgraded turbo and other fuel parts. Its been very solid. ????

Liqui Moly is pretty Good. Using it for all of my cars

Honda has their own which you can get from any Honda dealership (oil is blended by Idemitsu Pakistan). This is the cheapest, but still good quality and great value for money.

I used Amsoil Signature when I was driving 1300 miles a week just so I could go two months between oil changes.

ran Castrol 20w50 GTX in my 2.4 Naps Z D21 since new the mechanic who put on new head gasket w/215.000 due to a bad radiator said engine looked brand new inside

I change my oil every 3k miles with OEM Nissan Ester oil. My galleries will stay intact forever.

Used 5w40 castrol for most its life, but vw504 standard is good too. Using it now and the old man says it runs good.

I just use Kawasaki mineral oil or the Honda/Yamaha similar. Never had issues. Tried motul, liked the smell, same performance, more expensive, no point for me.

A mi shell no me resulto buena.