Whould you use Mobil 1 5w30 in 03 Cobra?

[Jim Vaccaro]

If so when would you change to Synthetic??

Jim V.

 

[SVTyballz]

This is far from a scientific schedule:

750 5w-20 motocraft (done today)
1500 5w-20 motorcraft
3000 Mobil 1 5w-30 and every 3000 after that.

might be overkill. oh well. I welcome any other suggestions.


gary

 

[Cobra'03]

http://forums.stangnet.com/showthread.php?s=&threadid=130770&perpage=25&pagenumber=2

Jim: The above is a thread I and several other engineers participated in - it is the best synoil and oil thread I have seen on the Web - much good info. I was a tribologist (lubrication scientist) for the first 10 years post grad, later switching to computer engineering, but I am rooted in cars and have built, restored, and raced them for many years. (SCCA class C license).

To answer your question driectly, the answer is yes - i prefer to use a 5w30 synoil, and Mobil 1 is a good one, although I prefer both Amsoil Series 2000 0w30 and Red Line 5w30. I would not use a mineral 5w20. You might also consider 0w30 Mobil 1, as its flow rates when cold are comparable to a 5w20 minoil, and its high temp stability and shear stability are much better. I posted on this Forum on "why 5w20" and it wasn't to reduce wear. I have real concerns that in hi-perf use, there will be much more boundary lube (metal to metal) in a 20 wt oil as its film strength is much lower than a 30 wt.

 

[Jim Vaccaro]

Thank's for all the info..

Jim V.

 

[TIAMAT]

Motorcraft 5w20 is a semi synthetic. It is the ONLY oil that should be used in any ford that call for 5w20. Per JDM!

 

[03 Red Cobra]

I will use Pennzoil 5W-20 for the first 10,000 miles. It meets the Ford requirements as listed in the owners manual.
After that, I'll probably use Mobil 1 5W-30.