I bought an 03 cobra but do not know who the last owner was so I don't know if they used synthetic or not. This is my first supercharged car so I was wondering if synt. is the way to go anyways.
synthetic or regular oil
- Thread starter DarkShadowSnake
- Start date
I'd use synthetic, your cobra deserves the best. I have a case full of royal purple sitting in my garage 5w20. 
Motorcraft 5w20 here. No issues, I heard if you change it every 3k miles it works great! :thumbsup:
Its your $10,000+ motor.
One thing i can say... when i had regular ford oil in the engine (after the new heads went on) when i went to empty my oil-catch bottle their was a white/yellow sludge that wouldn't pour out. I had to use a cloth and push it in their to get rid of it before putting it back. Iv'e never seen that before when running mobile1 5w30. I can only imagine where else in the engine that sludge has built up.
I use Mobil 1 Full Synth 10w30
I know the cap and book says 5w20 but I like the 10w30, always done me right.
I know the cap and book says 5w20 but I like the 10w30, always done me right.
Since you don't know what's in there now, use a synthetic. The stock oil is a synthetic blend. There a number of excellent synthetics to choose from, including.....
Mobil 1
Amsoil
Royal Purple
Castrol Syntec
Penzoil Platinum
Synthetic Oil Advantages
The technical advantages of synthetic motor oils include:
* Measurably better low and high temperature viscosity performance
* Better chemical & shear stability
* Decreased evaporative loss
* Resistance to oxidation, thermal breakdown and oil sludge problems
* Extended drain intervals with the environmental benefit of less waste oil created. Most, though, still change at the regular interval time.
Disadvantages
The disadvantages of synthetic motor oils include:
* Initial costs are usually multiplied by 3 compared to petroleum based oils.
* The lower friction may make them unsuitable for break-in with new motors.
Mobil 1
Amsoil
Royal Purple
Castrol Syntec
Penzoil Platinum
Synthetic Oil Advantages
The technical advantages of synthetic motor oils include:
* Measurably better low and high temperature viscosity performance
* Better chemical & shear stability
* Decreased evaporative loss
* Resistance to oxidation, thermal breakdown and oil sludge problems
* Extended drain intervals with the environmental benefit of less waste oil created. Most, though, still change at the regular interval time.
Disadvantages
The disadvantages of synthetic motor oils include:
* Initial costs are usually multiplied by 3 compared to petroleum based oils.
* The lower friction may make them unsuitable for break-in with new motors.
04CobraMatt said:
I saw that while running M1.
Thanks for all the info. As for JB if you refuse to answer don't write anything at all then.
I'm curious how many people run 5w20 compared to 5w30 and 10w30.
Now I'm trying to think if I got 5w30 last time or 10w30. Damnit.
I can't remember.
I think I've been using 10w30.
Now I'm trying to think if I got 5w30 last time or 10w30. Damnit.
I can't remember.
I think I've been using 10w30.
DarkShadowSnake, I just noticed you're new to the forum, and that you've recently bought your Cobra. So welcome! If I can be of any help to you let me know.
FYI, I have a helpful and basic FAQ page on my website. I was just talking to a guy today on the phone who told me how helpful it was to him. Feedback like that is nice to hear. Anyway, here is the link. http://www.stangshiftergaskets.com/2003_2004faqs.htm
FYI, I have a helpful and basic FAQ page on my website. I was just talking to a guy today on the phone who told me how helpful it was to him. Feedback like that is nice to hear. Anyway, here is the link. http://www.stangshiftergaskets.com/2003_2004faqs.htm
MustangThief said:
I run Motorcraft 5w20 with a full bottle of Lucas heavy duty oil stabilizer. 5w20, 5w30, 10w30 :shrug: Put what makes you feel warm and fuzzy and change it every 3k miles. I'm moving down to Texas in a few weeks and will most likely switch to 10w30 for the added wear protection in the hot dry climate. No body recommended me to do it, I'm just experimenting with my 10k dollar motor. :burnout:
JB said:sorry, I refuse to answer questions that have already been discussed ad nauseum
(there are 60 Terminator threads with SYNTHETIC in the title....)
.
ok then dont bother posting. maybe he wants opinions from different people that haven't posted in the past threads. and the guy just join the forums. so chill out you old fart
btw i use fully synethic mobil 1 5w-20
Mobile 1 5w30 here. It's done me fine so far.
thanks svtcobrar, your right I just wanted to hear peoples opinions about what they use and what they think is best. I put full synthetic 5w-20 today. I put 5 qts. but it looks like I need to buy another qrt tomorrow.
I believe the manual says 6 quarts.
I think Ford recommends the 5-20 for fuel economy, but I have read that 5-30 gives more protection.
Synthetic is better.
I think Ford recommends the 5-20 for fuel economy, but I have read that 5-30 gives more protection.
Synthetic is better.
what would you guys recommend for daily driven cobras???
5w20, 5w30, or 10w30????
5w20, 5w30, or 10w30????
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