I've got a 97' Mustang with the 4.6, it recommends 5W-30 but I've been tempted to try the motorcraft 5W-20. How far back has Ford okayed the use of 5W-20 in their vehicles? Thanks
Wow...a 97 foot Mustang...gotta be a limoquote:
Originally posted by MustangGT:
I've got a 97' Mustang
"Oh ye of little faith"quote:
Originally posted by Schmoe:
But first and utmost....WHY do you want to go with a 5W-20 in the 'Stang????? A 5W-30 would be the absolute minimum I'd run in a V8.
OK, I guess I just don't understand the Midwestern dialectquote:
Originally posted by darkdan:
Exactly, so kick the dino the curb and grab a group IV 5w30. =)
So run it longer than 3k! Problem solved.quote:
Originally posted by 97flairside:
well i just picked up 6 quarts of the 5w20 motorcraft from wallie world. Im going to give it a shot. Been using m1 full syn. 10w30 then swtitched to 5w30. Getting a little expensive at 3000mile int.
Sounds like your defense of MC 5W20 is primarily based on "good UOAs."quote:
Originally posted by 02supercrew:
How sure are you that it was the oil it self?quote:
Originally posted by mf150:
I just had a friend blow a "bulletproof" 4.6L "PI" mustang engine (2002 GT). The oil that was in the engine when it blew: 5W20 weight Motorcraft.
20 weight may be okay for conservatively driven street vehicles, but if you are going to put any stress on that motor, go with a 30 weight.
Dont suppose you had a UOA done on the oil to actually determine if it really was the oil?
And if it was really the oil, there would be a whole pile of cratered motors as a result from that bad batch of oil that your friends motor got.
Seems to me QS had something like this happen way back in the day.
Sorry, I have a hard time buying that your mustang sees more abuse that any mod motor in any Ford Truck in general.
I'm currenty looking at 5 V-10 service body trucks that all have over 250K on plain ole MC 5-20, and that's not counting the other 15 various mod motor trucks we have, all have more than 70K each.
Not to mention all the good UOA's of MC 5-20 on this board.
I don't blame you one bit. Even though I run 5w-20 exclusively, I too would think long and hard before I ran it in your car.quote:
Originally posted by mf150:
my mustang has drag radials on it during the summer weekends. It also can run the drag strip at a higher/faster speed than a number of mustangs out there. I have a FRPP 4.30 ring and pinion, Moser 31 spline axles, Eaton Posi set-up for teh rear-end alone, which revs teh engine higher at all RPMs.
lets not get into what I've done with the rest of the car. In short, it's set-up for naturally asperated drag racing, which in fact does put more stress on a car engine that or a normally driven/towing truck.
As I mentioned before, I'm not saying that 5W20 is goign to cause problems, but after all the money I've spent on my ride, there is no way that I will put a 520 weight in the heart of it all.
I don't blame you. I would not run 520 weight either. In fact as adventuresome as our Australian friends are in using thick motor oils I dont think they've gone past 70 weightquote:
Originally posted by mf150:
As I mentioned before, I'm not saying that 5W20 is goign to cause problems, but after all the money I've spent on my ride, there is no way that I will put a 520 weight in the heart of it all.