Engine oil AMSOIL or IDEMITSU

Originally switched to Amsoil for the Noack rating but stayed because it's just good stuff. I now run Amsoil products for all fluids in all vehicles.

I use AMSOIL 5W-30 for both of our vehicles. Never had any issues on either vehicle using AMSOIL.

Amsoil Signature 5w-20 + K&N Gold oil filter (HP1017 for 4th gens, not sure about 5th) is arguably the single best combo if you can afford the oil. Your lobes will thank you.

The first thing I did was change the oil using a wix filter and Amsoil signature series 5w30. The verdict is that the oil has plenty of life left and could have easily run longer.

Amsoil W20 I got a 5.7 it’s been great to me

Amsoil Signature Series 0w40 is an outstanding oil I run it with the SRT filter.

I am a big fan of amsoil. I purchased a used F150 in 2012 . It had 80,000 miles. The first thing I did was I changed the engine oil, tyranny fluid, and front and rear end lubs to Amsoil. It now has 242,000 miles and just keeps on running.

I have used Amsoil for years and I change my oil every 15,000 to 20,000 miles.

I did have a 1982 diesel Jetta go 435,000 miles on oem int. shaft bearings. I had access to a lot of free Amsoil back then....so, that may have helped. However, I think it over-lubed the cylinder walls though. Rings weren't exactly what you would call 'tight.'

I have used Amsoil, but I feel as if my motor makes a funny noise with that in it.