I've been running nothing but 5w-30 in my 02 GT that calls for 5w-20 since I got it at 103k, I'm now at about 115k and debating going to 5w-20, any thoughts on this?
I use 5w-20. Change recently to 5w-30, my car does seem to be running as well with the 5w-30. Maybe just me being paranoid. But i am switching back to 5w-20 . Next oil change.
I would stick with 5W-20. I use Royal Purple 5W-20. Mobile One would probably be good as well. Make sure you use the Motorcraft oil filter as it was designed specifically for the modular engines.
Hey Azure, I purchased 02 GT at 103k, I've been putting 5w-30 in, not knowing if the PO used 20 or 30, so would you suggest going back to 20 on my next oil change? I live in NJ, cold this time of year but already starting to have some warm(ish) days
Some of the other good ones may have this too, but I would check for it. I believe it is supposed to keep oil from draining out of the heads. Keeps lubrication up there for cold starts. Correct me if I'm wrong.:good:
The mechanic that told me didn't get into specifics. He just threw away the Mobil 1 filter I brought him and put on a Motorcraft one and told me it was meant for those motors.
Well I saw on a site that the 5w-20 oil would result in shorter lifespan on out engines. I am the original owner and I have 185000 miles on the car. Should u keep using it or got to something else ?
If you live in a hot climate, maybe it's not such a big deal as 5w-30 is a heavier oil weight. But, as for the 4.6L engines, I've always seen that you should stick with 5w-20 oil.
The 3.8L v6 isn't a modular motor, right? But, you can't go wrong sticking with what the manufacturer suggests. If you want more protection, I would go with a good synthetic oil rather than change the weight of the oil.
Yeah the oil change place said it was the rear main but when I look at the rear of the valve covers they were wet with oil. I think the oil was running down the back of the engine.
The link Azure posted is a good link that says to not really put anything other than 5w20 in the 4.6. I have a good friend that has worked for Ford as a mechanic for a while and told me to always use 5w20 only in these motors. I've always used Motorcraft synthetic 5w20 on my car with no issues. I'm thinking of starting to move to Mobil 1 next.
I decided to change oil today and have been using 5w20 Mobil 1. I was going to buy Mobil 1 0w20, but walked out with and installed 5w30 Royal Purple. I am easily distracted.
Most cars built after the 2000ish model year say to use 5-20. The fact is that the majority of your quick lines will still put 5/30 in it. You can definitely feel the difference between the two if you compare them but it is safe to use 5-30, specially on a higher mileage motor. Honestly i cant remember the last time i ran 5-20. Its really more of an energy efficient thing claimed by manufactures. Alot of the local blown guys run 10-40 with no issues. Even blown i run 5-30 though. Clearances on modulars are tighter than most older motors
I took the car out today and hear and feel no difference. Will keep an eye on mileage.
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