I thought it was interesting and educational.

http://www.unofficialbmw.com/all/misc/all_oilfaq.html

 

I thought it was , too!

 

Here We Go Again ...

(good info coop)

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2001 SuperCrew XLT
Oxford White, Med Graphite Interior
5.4 Liter
4X4, LS Rear, Tow/Trailer
Skids, Captains Chairs
285/75/16 BFG ATs
Ford/Duraliner
Ordered 7/23/2000 Built Week of 10/28/2000 Delivered 11/14/2000

 

It also states,

"10W-40 and 5W-30 require a lot of polymers (synthetics excluded)"

and,

"Oils that can do their job with the fewest additives (polymers) are the best"

and,

"Mobil 1 uses no viscosity improvers in their 5W-30"

 

Sounds like 5w-20 would be better than 5w-30 because they are both made with a 5W base and the 5W-20 would have less polymers or viscosity modifiers to burn on my rings and pistons. Which agrees with what Ford has been saying all along. Less friction, higher gas mileage and lower emmissions due to less modifiers. Hmmm.....

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01 Black XLT 4x2 Screw Gen I, 5.4, Moonroof, 3.55LS, Cloth Captains, Slider, Extender, ClassIII towing, 6 Disc etc.
Mods planned:
Gibson Single Sweptside, AirRaid, Superchip, Line-X bed liner, Fog/driving lights, Tint, Speed grill.