Engine oil Mobil or AMSOIL

I've been using Mobil1 in my car for three years because the garage I worked at had a contract with their local distributor, and that's what I got at a steep discount. Last year I put Total's equivalent oil in it, absolutely no discernible diffrence between the two.

I run 5w30 Mobil 1 ESP with a Mann filter every 10k kms on my 7.5R. Got a great deal on it when it was on sale. It meets VW ratings, and I feel like that is really what is important.

I am using Liqui Moly now, but was using Valvoline/Mobil 1.

Got my car at 36k miles, and used the Valvoline/Mobil 1 up to ~300k miles and no major issues…

For me amsoil signature series 0w20 a lot better than ravenol ehs 0w20.

I'm regularly using amsoil ss on my Honda L15z1 engine almost 7 years.

0W-20 Amsoil Signature Series 100% synthetic oil changed every 5k miles. Wix 57173XP filter.

I use 5w-20 full synthetic from Mobil One. I change it every 5k miles, no more, and never have any issues with it.

I prefer Mobil 1 oil, some people will swear by the or that brand. I just wouldn’t buy store brand stuff myself.

I am running 0W-30 (already passed my powertrain warranty). Engine sounds quieter and better (ie less trashy).

I just switched over to amsoil and my mpg went down marginally. Also using the PPE larger oil filter 10 micron filter.

I was running it in a VR6 engine, and couldn't believe how much extra chain and lifter noise there was. I put up with it for a couple weeks, thinking it might get better but it didn't, so I switched to Castrol Edge 5w-40 and noticed the difference immediately. Noise means wear, so I feel comfortable staying away from M1 for my VR6 engines.