What kind of oil have you guys had good luck running? I am on the Mobile 1 synthetic myself, have used in every vehicle I have owned since day 1, well almost anyway. I have always had great luck running it, so why change??? Just wondering if you guys had anything else you were using like Amsoil or what ever, post your findings!

I've been useing castrol syntech for a while now, but I thinking of changing to amsoil or redline.

I've always used Valvoline until my last 00 Silverado which I ran Mobil 1. I change the oil at every 3K and at $5 a quart, it get's kind of expensive. I've gone back to Valvoline 5w-20 my last couple of changes and noticed no difference. My last oil change, Wal Mart didn't have Valvoline 5w-20 so I bought Castrol GTX 5w-20. I don't think you'll notice much with any oil and changing it at 3K, it keeps good clean oil in the engine. Good, clean fluids are the life blood of a car or truck, do good Preventative Maintenance and you won't have alot of problems.
Jim

I agree with Ram4Pick, doing good preventive maintenance will prolong the lift of your vehicle. I would deffinently recomend a synthetic oil to anyone though. Just my 2 cents!

Amsoil, let me know if anyone needs some, get it to you cheap.

I've used Castrol Syntech 5/20 but am switching over to Royal Purple on my next change. I've gone to RP in my tranny and diff so may as well go motor too. Anyone see the Horsepower TV episode where they dynoed a mid-90's Camaro, switched all fluids from dino to RP and gained about 8hp?

1FUNZ71:

How much for a motor flush and 8 quarts of 2000 Series 0w30?

Amsoil 0/30 and about to change it, going to go to 0/20w this time though. Oh yea, been doing the extended oil changes, I have 22,000+ on this oil change with a filter change every 6,000 miles ( instead of the 12,000 ) and the engine has not been using oil and it still looks good. ( visually anyway ).

TJ

I run Amsoil 5w20 :chug: Great stuff!

In all my years of tearing down motors at the dealership the ones that where using Castrol,quaker state and penzoil had a lot of sludge when used for long time .I use mobile 1 or valvaline

Gotta stick my 2 cents in here, Been working in an automotive machine shop for over 20 years and have seen sludge with any oil no matter what the brand if it was neglected. I have seen clean engines with all brands of oil as well. I have personally used Castrol brands of oil since their introduction and have yet to have a single sludged engine. I do know if you add even a small amount of coolant to the mix you have instant sludge.... you will not even notice if you have a very small leak into the engine but your oil will be sludging. The very worst oils I have seen for sludging were the oils that were based on crudes that came out of the Gulf. Those oils had clays in suspension that when the oil was overheated, those clays would fall out of suspension. I have seen Exxon oils changed every 3,000 miles and when the intake was removed to replace it with a Edlebrock Performer the sludge level was even with the bottom of the stock intake.... I could not believe my eyes. I knew this guy, his truck was well maintained, I still feel like there was something else wrong but could find nothing.
TJ