Some say 5-30 is to heavy in our lightning motors???

 

But some say 5W-20 is too thin for our High Performance motors? Me Myself would think 5W-30 is better

 

Amsoil

 

Why would Ford let them out of the showroom with too thin of oil when they know they would have to deal with warranty issues if the motors went from too thin of oil? Honestly, I really don't think you'll ever notice a difference, but I just play it safe and use exactly what it calls for.

 

JFYI, my SVTL has the factory sticker under the hood, I noticed this yesturday, it says 5w30 is recomended. I always thought it was 5w20??? but anyways, I use

5w20 Mobil 1 Full Syn every 3k miles.

 

Ford switched to 5w20 for all '01 and up models...previous years were 5w30.

 

5w20 Mobil one full synthetic with a motorcraft filter for me every 3000 miles

 

castrol 5w-20 synth. blend

 

Amsoil 5W-20 Synthetic -- since about 3,000 miles. 51,000 miles now.

 

Castrol 5w-20 here. Used Castrol in every engine I've ever had and built, zero problems, very clean inside the engine everytime I checked, especially the CJ429 in my 70 Cobra Torino with different weight of course.

 

broke in my built motor w/ Motorcraft dyno then switched to Redline 5w30. There is a good book about Ford Mod motors and what is the best oil for them.
Josh

 

Castrol GTX 5 - 30

good clean oil.
about 10 bucks for 5qt. jug

Fram PF-2

Runs awsome.




1997 F-150 XLT Supercab 5.4L(330c.i.)
(mostly stock...)

 

Royal Purple 10W-30 for my built motor.

 

Royal Purple, Red Line, and Amsoil...if you can afford it. Seems most use Mobil 1 and is a good brand. Personally, I use Royal Purple.

 

Royal purple same price as Mobile 1 but they did a dyno and added over 8 hp to the WHEELS by changing OIL, Tanny, and Rear End dope ... THATS ALLOT