Synthetic Oils
 

Ams oil/Royal Purple/Other? Whay is everyones preference and why? What grades are you running? Racing versus standard versus marine?

the amsoil true believer guys like amsoil. the royal purples and other specialy brands, in my opinion, are just marketing. for me in about a million miles of racing in every environment imagineable in motors and gearboxes of every description, i have never found a better lubricant than the mobil 1 full synthetics. there was a company in california that made a product called NEO synthetic oil which was absolutely spectacular but 10 times the cost plus we had to ship it from ca. and t was worth it for war emergency sort of applications but for everything else from winston cup to formula atlantic to imsa GTP, off the shelf mobil 1 was the best by far.

the neo stuff was amazing. they made a 0 wt gear oil that was thinner than water and looked like lime coolaide... it had absolutely zero drag and made a repeatable and measureable improvement on the stop watch back to back every time... and the gear boxes would come apart at a 1000 miles and look absolutely brand new.

Lots of threads on this, do some searches, it'll kill a few hours!

General opinion leans toward Mobil1 and Amsoil.

I run Mobil 1. It's great, semi cheap, and readily available.
Can't beat the 5 qt jugs of 15w50 at Walmart for $22 to $24 bucks.

I like M1 5 qt. jugs, can't beat the price to. I use 15-50.
Amsoil severe gear 75-110 in the drive.

I use Amsoil in everything I own. There is a HUGE thread just on oil take a look.

I'm an Amsoil guy.