I run 7 quarts of mobil 1 synthetic 5w-20 on my cobra and a motorcraft filter. Several ford mechanics suggested this set-up because cobra motors are known for spun rod bearings due to lack of proper oil pressure. Discuss your oild and filter!

 

Hmmm. I dont own a Cobra, but Ive never read or heard about this. Im also not very fond of dealerships and their mechanics. So IMO, I wouldnt listen to them. As far as I know, its bad to run too much or too little oil compared to the dipstick. Do more research on modulardepot.com, modularpowerhouse.com and svtperformance.com.

 

That's also where I did my research.

 

What did you find there?

 

Close to the same but some use 5w-30.

 

I use 6 quarts of Mobil 1 5w30 with a Motorcraft filter.

 

Too much oil can certainly cause bearing failure, especially on the camshaft journals. Windage can cause your oil to "froth" up and get foamy when there is too much oil in the pan. As a result, low oil pressure causes starvation. At most, fill your pan to the top hatch marks on the dipstick while the motor is cold.

EDIT: IMHO, I'd also reconsider using the factory recommended 5W-30...Mod motors have very tight clearances, and the lower weight oil is thicker which is exactly opposite of what you would need on a motor with such tight spaces. Again, search around the respected boards and see what you can come up with. You'll get lots of opinions!

 

Yeah, to much can be a bad thing. Also 5W20 or 5W30 is perfect for mod motors, it's thin and recommened for mod motors.

 

Broke in my modded GT and my wife's 06 Charger (yep, it's got a hemi in it) with Royal purple oil/filter.

 

Ack.. I just noticed I have the weight statement backwards The lower the numerical value, the thinner the oil is. Yes, mod motors need thinner oil.

 

Mod motors have the recommendation of 5w20 and I dont think mobile 1 offers 5w30. The only reason why they recommend 5w20 is because it looks great on paper and ford saved themselves some better MPG. Im sure its .01 mile per gallon but on paper thats millions of miles with all their cars. I think they got a government grant out of that as well.
I used to run mobile 1 5w30 untill i switched to amsoil 5w20. I didnt have any problems running mobile 1 even during hard runs like at a road course or the local 1/4 strip.

 

I've heard Amsoil is great stuff. I can't find it anywhere local, but when I finally get my motor issues straightened out I think I'll order some. How often do you change your Amsoil?

 

Ive been buying Mobile 1 5w30 for every change...

 

I changed it at 7k last time but it sat over a winter and had probably 15 1/4 runs and I was a little low and it was darker than usual, so Ill probably switch out at 5k this round. I also run 7k filters.

 

Sorry I meant to say our mustangs suggest 5w20 and I dont think mobile 1 offers a 5w20, only 5w30. Sorry for the confusion.

 

Mobil 1 does offer a 5w20 thats what i used for my last oil change..

 

Yep, they offer 5w20 too. But I use 5w30.

 

Mobil 1 offers 5w-20 in everything but their extended performance version. Just curious, does it matter which oil is used (5w-20 vs. 5w-30)? Is there any issue that might arrise from using 5w-30?

 

If there was then I dont think so many Mustang guys would be using it.

 

The difference is VERY VERY VERY VERY minimal and shouldnt be of any concern when using 5w20 compared to 5w30.

 

I have been using Mobil 1 5w30 also. no complaints....

 

I usually use either amsoil, redline or castrol GTX. I change my oil and filter every 3k. My oil choice depends on what I'll be doing that season, if it's just to work and back then I'll use castrol, if there's any kind of performance driving to be done then I pony up for a fresh shot of synthetic.

I have an 8 quart system with my oil cooler in place so I never really have to worry about having enough oil. I'll use any filter as long as it's not Fram or another allied signal made unit. Warner, WIX, and motorcraft are all the same filter and I use those almost without exception. Usually I'll go to my local Oil Changers store (like goofy lube but not so full of morons that leave filters off and drain plugs out) and buy one of their Warners. I used to manage some of their stores so I still get a hookup on the price.

 

I have used jiffy lube before and I will never do it again. The guy there kept telling me that I needed a new air filter cuz my k&N was a little dirty. I was like "No, my filter is fine." Then the guy went on to explain how the engine breathes and all this other BS that I already know. After getting him off this subject he said that I needed a new brake light. So I told him to show me the broken brake light. After he gets in the car and I step behind the vehicle I see both brake lights are working just peachy. So I complained to there manager and got that oil change for free. GO ME! Redn3ck do you know where to get a good tranny/oil cooler?

 

speedconcepts.net, MT, summitracing.com would be good places to start. B&M and Hayden both make decent units

 

http://forums.modulardepot.com/showthread.php?t=58817