Has any one changed the oil weight in there shelby,ford uses 5w 50 I was thinking of going to 15w 50.

Stick with what's recommended by Ford - 5W50 synthetic.

Just to be safe, I suggest staying with the recommended oil, but if you live in a warm climate (CA or AZ) going to 15W50 should not cause any problems.

Has any one changed the oil weight in there shelby,ford uses 5w 50 I was thinking of going to 15w 50.

NO. It's 5 weight so it can move everywhere and lube everything easily. Especially when it's cooler/cold. AND 5w is environmentally superior because of less friction on the engine (he said, while getting 11mpg around town with his foot stuck through the firewall :cool: ).

Seriously, it's 5 weight for a reason. Don't screw with it.


bj

Even in AZ you are taking chances that it won't become cold. Last winter it got down in the 20's in PHX for several nights in a row - killed most of the Ficus trees around here and bursting water pipes.

Use what Ford recommends and it cannot be used against you if warranty issues arrise.

It has alot to do with the lifters and RPM. 5w so you get no lifter pump up. Some of the fastest mod motor cars at the track run 0w50 oil for this reason. As in 2000+HP cars.

It has alot to do with the lifters and RPM. 5w so you get no lifter pump up. Some of the fastest mod motor cars at the track run 0w50 oil for this reason. As in 2000+HP cars.

Well, I'm only trying it out for now. I changed to Royal Purple 5w30 and did pick up 4 more RWHP without drastically changing the tune. Just wanted to see what it would do.

That's just flip, yet I'm always different anyway.:D

flip

Stick with what's recommended by Ford - 5W50 synthetic.

I would be careful if you vary from what FORD recommends and if something happens under warranty and the dealer hasn't changed your oil. You better show some Receipts for what you bought. Just my opinion of course.

http://forum.teamshelby.com/forums/index.php?s=&showtopic=8208&view=findpost&p=298971

I am in the process of having the Moroso 7 Qt. pan pun on mine, along with some other goodies, and they strongly suggested to use the Ford Motocraft oil. I was told that their is an additive missing in some of the others such as Castrol Syntec which I used on my first change. I cannot say what the additive is, but Curtis at Archangel Motorsports, said he had had changed from the Castrol in his own personal GT500 and GT. It's a little pricy (~$90.00)/ case of 12, but I'm taking his advice.

I am in the process of having the Moroso 7 Qt. pan pun on mine, along with some other goodies, and they strongly suggested to use the Ford Motocraft oil. I was told that their is an additive missing in some of the others such as Castrol Syntec which I used on my first change. I cannot say what the additive is, but Curtis at Archangel Motorsports, said he had had changed from the Castrol in his own personal GT500 and GT. It's a little pricy (~$90.00)/ case of 12, but I'm taking his advice.

Check out K-Mans website $6.59 qt and he'll send out a case as well.

http://k-mansparts.com/items/mustang/filters~fluids/list.htm

Thanks fllaw1.

Check out K-Mans website $6.59 qt and he'll send out a case as well.

http://k-mansparts.com/items/mustang/filters~fluids/list.htm

I bought 20 quarts and some filters about 2 weeks ago.

Fast delivery.

Cal