oil for highly modified 03 Cobra

[Jtgrant]

I did an oil analysis on this car with the stock pullied Eaton on it with bolt ons.

I ran BMW Castrol HP 5w30 with a bottle of Lubro Moly and 1oz per quart of GM EOS. I ran an oil test from Blackstone and the result were stellar.
The was when the car had around 530 HP and 580 Torque at the engine.

Now the car makes around 700 HP and 670 Torque at the engine.

Vehicle is an 03 Cobra 10Th Anniversary with 53k miles on it, a lot of modifications and the power comes from a modified version of the Eaton TVS 2300 with a 2.8 pulley that comes on the 2013 GT500. I few other GM models use this same supercharger. Anyhow engine is stock and sees around 18 lbss of boost, depending on condtions.

These engines came from the factory with Forged Cranks, Manely H-Beam rods, forged pistons and more of a race spec type of rod and main bearings.

I use Mobil 1 0w-40 with the same brew during the summer and BMW Castrol 5w30 (same crew) in the winter.

I still haven't gotten around to doing a used oil analysis of the Mobil.

I love the add pack in the Mobil 1 15w-50 but I think my 170 T-stat is too low for that heavy of an oil unless I took to the road course for a track event.

Just asking for some input or advive.

Thanks

 

[Gene K]

I dont see an issue with what your currently doing. Im not sure all the additions are necessary but they dont seem to be hurting.

In truth if it was mine it would likely be getting untouched Mobil 1 0w40 the year round.

 

[dave1251]

I would use Mobil 1 Turbo Diesel Truck 5w40. That is just because I do not think too highly of Mobil 1 0W-40 but that is not a bad oil. You could try Red Line 5w30 but we would need a analysis to give you anything that could resemble a informed recommendation.

 

[Jtgrant]

Thanks guys

 

[OVERKILL]

A tuner friend of mine (runs Torq in Florida) ran Mobil 1 5w30 in his 850RWHP twin turbo termi when he owned it FWIW. He had no issues with it.

I'd keep using the Mobil 1 0w40. I run that in my M5 and it is the factory oil for, as well as meeting the spec's for a number of very high performance forced induction applications that are similar to yours.

 

[aquariuscsm]

I`d use either 5W50 or 15W50 if I had a Cobra.

 

[DragRace]

You'll get better idea what to use @ the SVT forums http://www.svtperformance.com/forums/search.php?searchid=10250463

Second of all,I know a few cobra owners @ our local track,all of them run 5w30,10w30,etc.with no issues.

 

[addyguy]

Super-high performance Mustangs all run 5W-50. Ford seems pretty confident that 5W-50 is the grade to run in high output Ford engines, so that would sway my thinking.

In GA, you easily use Mobil 1 15W-50 year-round w/o issue.

 

[DragRace]

Originally Posted By: addyguy
Super-high performance Mustangs all run 5W-50. Ford seems pretty confident that 5W-50 is the grade to run in high output Ford engines, so that would sway my thinking.

In GA, you easily use Mobil 1 15W-50 year-round w/o issue.


This is a 03 cobra,not the newer style motors,entirely different.

 

[TFB1]

In a highly boosted(18Lb is high) engine I would not run anything less than a xW-40... That said I use Mobil 1 0W-40 in my now supercharged Marauder that naturally aspirated was specked for 5W-20...

 

[Jtgrant]

I have thought about using the Mobil 1 15w-50.......what do you guys think?

I use it in my Dad's 07 GT500, I know the engines are different but I looked up the bearing clearances between the two and they are almost identical. I know there are a lot of variables in specing an oil for an engine.

Remember I also use a 170 t-stat and see around 178-182 on warm days. I really need to install a pressure and oil temp sensor. Oil temp as we all know on this site is very important for oil vis. selection.

 

[HTSS_TR]

You may want to try a mix of half and half Mobil 1 0W40 and Mobil 1 15W50.

 

[aquariuscsm]

Go for the Mobil 1 15W50. It`s a *thin* 50 weight.

 

[Jtgrant]

well I just bought 30 quarts of the Mobil 1 0w-40 on the Advance Deal a few weeks ago.

 

[Jtgrant]

I have also heard of Lash Adjuster issues on Fords with too thick of an oil.

 

[DragRace]

Originally Posted By: Jtgrant
I have also heard of Lash Adjuster issues on Fords with too thick of an oil.

I've already tried to tell you,you'd be perfectly fine with a 10w30 weight oil,there's 2 cobras here at the track where I'm posting from atm,one car runs low 10's ,the other 11's,both run 10w30,with no issues,no sure what with this forum and guys reccomending 50 weight [censored] oils.

 

[A_Harman]

As long as you're just drag racing the car, and not getting the oil temp over ~180F, the Mobil 1 0w40 is fine. If you were to do track days and started hitting temps over 280F, then you would need to consider improving the oil cooling system to control the temperature.

 

[MetalSlug]

5w30 mobil 1 with mobil 1 oil filter. I seen many high horse power running that combo, from 900+ sabaru too 1000+ supra to 600whp z06, my local dealer having 03 cobra convertible 500+ whp running same combo.