You definitely want to run full synthetic. I would recommend royal purple or amsoil as they are the best of the best, but you could also run mobile1 and not have any issues. as far as viscosity, I've run 5w30 and 10w30 with no issues. The Hayes books on firebird/camaro 93-02 say to use the higher as long as you aren't somewhere that gets too cold. if you're in the northern hemisphere or anywhere that it snows a decent amount really, your best bet is 5w30
20-50 wt motor oil OR HD Primary oil
5W30
klotz
What type of trans oil does and how many lts
Any brand 5w30
Rear main seal.
What is the best motor oil to use on a 1999 Chevy Malibu?
The 1999 Oldsmobile can use any SAE certified motor oil. The manufacturer recommends 10W-30 weight motor oil. Extreme climates can use a heavier motor oil.
motor oil
The trans does not use gear oil. The auto uses ATF+4 and the manual uses a special manual transmission lube.
what type of engine oil is used in a 1999 ford expedition -------------------------------------------------------------------------- 5 W 30 ( with filter change - 6 quarts / 5.7 liters )
20/50 motor oil and you can use sport trans fluid in trani if you can find it. this is the old fluid used, but you can also use the new stuff which is Formula+ or the synthetic Syn3 in the trani, both of which are available at Harley dealers.