Engine oil Mobil or AMSOIL

amsoil here too, right now 5w30 going to switch to 0w30 soon, best stuff for the $$$

did my first oil change 2 weeks ago, put Mobil1 0w-40 in... and I'm getting better gas mileage than I was on the factory oil

Amsoil 10-30 my dad's an amsoil dealer

I used to run Mobil 1 5w30 and switched to GC. There was a nice difference, with only one side effect - the engine feels super sluggish when cold compared the Mobil 1. It runs great once warmed up though!

I've used Mobil1 (0w-40, 5w-30), Shell RotellaT (5w-40) and Castrol Syntec (5w-30) past 100k miles. Before 100k, it had whatever garbage the dealer put in. Engine still runs like a top with great fuel economy and no unusual oil consumption at 203k miles.

I'll continue to use my Mobil 1 0w-40 for another 4 years.

Amsoil VW Approved European 5w40 is a great oil! Amsoil has a gurantee and no one esle can challenge that they are any better in quality or protection. Their oil was designed for long drain intervals and have superior protection.

Mobil 1 does make 5W-40. I use it. They label it Truck and SUV but don't let that throw you-just a marketing ploy. I switched from 0W-40 and my oil temps are slightly lower. My car is not winter driven so I don't need anywhere near a 0w. If I remember correctly 5w-40 is thinner than 0w-40 above freezing anyway.

same here in IL - 132K still going strong

I use Mobil 1 0w40 year round in Missouri, never had a problem.