Slammintone

When I got my 2007 GT last year the consensus here was to use 5w-20 motor oi as recommended in the manual, which I have done going with Mobil 1. Now I've read we're supposed to be using 5w-30 in the S197 Stangs but I cant find the info here since the search function isn't working for me at all. So, what should I be using and why? Thanks!

alloutt

was looking for the same info heard somewhere that 5w-30 would be ok to use but can't find where
I just use some 5w-20 royal purple to be safe.

06legend

OK, let me get this straight. Someone told someone that Ford engineers actually recommended 5W 20 as part of an EVIL plot to ruin all S197 4.6L. After all, what do they know about tolerances and oil passages . Hummm, conspiracy theories may be fun but I think I'll be staying with OEM recommendations. If still not satisified, I guess you could check in with the brain trust, (drop outs) down at your local Jiffy Lube for the real scoop. Why end here, try getting the real behind-the-scenes dirt on their Motorcraft oil filters. Might be some money in it from Fram or K&N. LOL dude

Riptide

Christ not this again. We just had a big thread about this last week.

I am sticking with 5W-20. Unless you run your car extremely hard and in very high heat 5W-20 is just fine. I asked this question over on bobistheoilguy.com as well.

The issue is that some people say Ford recommends 5W-20 purely for mpg savings (CAFE). Scott Whitehead, ONE of the engineers who worked on the 3v 281, says to use 5W-30. There is controversey over whether Ford would honor your warranty if you used 5W-30 though there may be ways to lie about it and get away with it should that ever be an issue.

hammeron

i see no good reason not to
use the recommended 5w-20,
unless you can save a substantial
amount of $, by using 5w-30

Nuke

Are you having problems using what your owner's manual tells you to use? If so, I'd contact Ford and have them make a recommendation in writing. Otherwise, you want to change WHY to 5W30?

Yes, this topic is getting old. If you don't like 5W20 then switch. I personally doubt that it'll hurt but you run the possible risk of an argument over warranty IF anything should happen.

Argonaut

+1 - Stop this thread now. Which oil and which oil weight are IMO the two worst subjects on this forum, they have been debated over and over and every thread degenerates to insults and zero consensus. You dont need the search function - just go backwards in posts a couple weeks. I think there were three separate threads on this subject.

algregory

Old news from a sadly not so young guy. Years ago I worked at a Sear's Automotive Center. We had a "Wizard Mechanic" that was already pretty old at the time. Built many engines in his time. Of course we know that the NEW engines of today are just way better than the old days in all respects. He told me once, run 10w on a new engine, when it starts using oil, go to 20w, and so on, till it used 50w then rebuild. I knew another fellow, had an old Plymouth, the book said change the oil every 1,000 miles and he did it as long as he owned the car.

Old story from an older guy. Me, I've been into quality synthetics Redline for years, now Amsoil, for some twenty-five years and Tufoil at least fifteen years.

GidyupGo

Make no mistake, you don't want to use 30W. There were a couple of fools on here saying 30w was better but I think their willingness to go against the manufacturer's recommendations speak for themselves.

one eyed willy

i run the motorcraft 5w20 and plan to keep with it even after the turbo is on the car.