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Old 02-25-2013, 10:05 AM   #1
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Can i use 5w-30?

My 2000 gt has over 185000 miles on it. Should I go to 5w-30 from 5w-20 ?
Or is there another grade of oil that would be better?
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Old 02-25-2013, 10:43 AM   #2
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I use 5w-30 in the summer and 5w-20 in the winter. I also have figured out 5w-30 will quiet ticking under that valve covers on high milage cars
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Old 02-25-2013, 10:56 AM   #3
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I use 5w-30 in the summer and 5w-20 in the winter. I also have figured out 5w-30 will quiet ticking under that valve covers on high milage cars
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?
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Old 02-25-2013, 11:20 AM   #4
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5w-20 is mainly for emissions, I use 5w-30 and you can as well
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Old 02-25-2013, 11:28 AM   #5
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I use 10 40
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Old 02-25-2013, 11:33 AM   #6
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I use 5W-30
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Old 02-25-2013, 01:21 PM   #7
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I use 5w30 synthetic Mobil 1
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Old 02-25-2013, 01:45 PM   #8
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Can i use 5w-30?

Quote:
Originally Posted by Mfore33 View Post
My 2000 gt has over 185000 miles on it. Should I go to 5w-30 from 5w-20 ?
Or is there another grade of oil that would be better?
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.
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Old 02-25-2013, 02:02 PM   #9
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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.
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Old 02-25-2013, 02:19 PM   #10
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I have heard the same thing about the Motorcraft oil filters. I use 5W-20 Mobil 1.
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Old 02-25-2013, 02:28 PM   #11
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I have heard the same thing about the Motorcraft oil filters. I use 5W-20 Mobil 1.
I think it's the ani-drainback valve. Motorcraft Oil Filter

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.
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Old 02-25-2013, 02:31 PM   #12
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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.
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Old 02-25-2013, 03:59 PM   #13
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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
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Old 02-25-2013, 05:17 PM   #14
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Originally Posted by NJstanger View Post

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
Yes, that's a colder climate kinda like here in Indiana. The only way I would put 5w-30 in my engine would be warm climate like south Florida, etc. If you are kinda worried about summer months protection or if your driving it really hard, you could go with the synthetic oils that will not break down. Like Royal Purple, Amsoil, Red Line, Mobile One, etc. This is my opinion, but you can't go wrong with what the manufacturer suggests. I believe Motorcraft makes a long life oil filter too that you can use for 5,000+ miles. I'm not sure what the part number is.
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Old 02-25-2013, 06:06 PM   #15
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Yes, that's a colder climate kinda like here in Indiana. The only way I would put 5w-30 in my engine would be warm climate like south Florida, etc. If you are kinda worried about summer months protection or if your driving it really hard, you could go with the synthetic oils that will not break down. Like Royal Purple, Amsoil, Red Line, Mobile One, etc. This is my opinion, but you can't go wrong with what the manufacturer suggests. I believe Motorcraft makes a long life oil filter too that you can use for 5,000+ miles. I'm not sure what the part number is.
Thanks Azure, I actually been using Mobil 1 synthetic 5w-30, I've always used motorcraft filters..looks like I'm going 5w-20 next change, thank you again
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Old 02-26-2013, 01:03 PM   #16
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Thanks Azure, I actually been using Mobil 1 synthetic 5w-30, I've always used motorcraft filters..looks like I'm going 5w-20 next change, thank you again
+1 been doing the same thing 5W 30 every time I changing my oil and use motorcraft oil filter.
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Old 02-26-2013, 02:15 PM   #17
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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 ?
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Old 02-26-2013, 02:28 PM   #18
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Originally Posted by Mfore33 View Post
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.

Ford 4.6L Engine

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.
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Old 02-26-2013, 02:40 PM   #19
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I live near Nashville tn. I've used full synthetic once and car started leaking. It stopped when I went back to conventional
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Old 02-26-2013, 02:50 PM   #20
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I live near Nashville tn. I've used full synthetic once and car started leaking. It stopped when I went back to conventional
I had that problem with my 88 GT. I switched to standard 10w-40 oil, but that is a different engine. So your 4.6L started leaking?
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Old 02-26-2013, 07:32 PM   #21
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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.
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Old 02-26-2013, 07:38 PM   #22
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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.
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Old 02-26-2013, 08:26 PM   #23
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I use 1030 but my my 97" is board 30 over
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Old 03-09-2013, 06:39 PM   #24
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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.
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Old 03-09-2013, 09:22 PM   #25
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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.
I don't think it will hurt.

Ford choose 5w20 for a reason though
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Old 03-10-2013, 08:43 AM   #26
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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
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Old 03-10-2013, 03:28 PM   #27
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I took the car out today and hear and feel no difference. Will keep an eye on mileage.
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