[arpad_m]

Originally Posted by ShadowLT1

Amsoil is technically the better oil, but very slightly, and for that slight advantage comes a much more expensive price tag. Is that little advantage worth it? That's up to the buyer and owner of the vehicle. I've been a Pennzoil Ultra Plat guy for a long time and still use it. However, I still change my oil every 5k miles or every 3 months whatever comes first. Not a track guy, just a daily driver who obsesses over maintenance!

I pay $11-12 per quart for the Amsoil Signature I use, so it isn't much more expensive than the Mobil1 Supercar 0W-40. Honestly, I never understood why people would want to save $1-2 per quart of oil looking for Walmart or Costco deals, or buy an oil filter that's $2-3 cheaper... this is the lubricant that keeps your $10-15K engine alive, the filter is what keeps particles out of combustion chambers, they aren't where one should cheap out IMO.

Originally Posted by N Camarolina

Penzoil and Amsoil might be high quality oils, but the additive package may not be compatible with design requirements for the CATs and/or the engine. Do those of you using these oils know if the ad pack is same profile as Dexos 2 ?

I'm not sure if it's the same profile, but I probably should (and will) just shut up in this Supercar 0W-40 thread with my built LT1. I'm not recommending that anyone switch to Amsoil, I'm just saying it's the best oil and my engine is happy with it.