5w-20 oil? Keep or change to 5w-30
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 4:56:03 PM
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mustangman02232
Posts: 11994
Joined: 12/22/2004
From: Ludlow, Mass
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whatever ford recomends, but run royal purple
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:14:41 PM
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androdz
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quote:
ORIGINAL: mustangman02232
whatever ford recomends, but run royal purple
I was specifically told by the distributor the only reason they do it is because of incentives for better mpg. Thinner oil means less resistance between moving parts = higher efficiency which then transforms into higher mpg. He said that 5w-20 is good for fuel efficiency but it does not protect the motor adequately and if I was planning on having the motor for the long run I should switch to 5w-30. Any other opinions?
Att. Andrew
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:23:05 PM
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MikeVistaBlue06
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They have a lot of 5W-20.
< Message edited by MikeVistaBlue06 -- 1/15/2007 12:03:31 PM >
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:27:04 PM
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Rt1Rebel
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I'm sticking with 5-20 in the Mustang. If you use synthetic and change regularly, the oil will hold up, so shooting for a wear range for the oil isn't something you have to worry about. I use 10-30 synthetic in all my other cars even though it's not recommended for them, but none of them are nearly as sophisticated as my 4.6 3V.
< Message edited by Rt1Rebel -- 9/3/2006 5:28:39 PM >
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:35:24 PM
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androdz
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I understand but It is also a fact that ford selected the 5w-20 to get into the incentives the goverment gives for higher mpg cars.
ATt. Andrew
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:40:05 PM
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Rt1Rebel
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I seriously doubt Ford would recommend an oil weight that was going to cause problems with their flagship auto just to meet a number. What are we talking? 0.05 MPG? If it were that easy, everyone would be making engines to run on helium weight oil. Anyway, I doubt 5-30 would cause a problem either, so go with it.
< Message edited by Rt1Rebel -- 9/3/2006 5:43:11 PM >
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:48:36 PM
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MikeVistaBlue06
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5W-30 oils
< Message edited by MikeVistaBlue06 -- 1/15/2007 12:04:03 PM >
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 5:55:08 PM
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androdz
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Well the dealer told me it was to get some incentives the goverment was offering for higher mpg engines. Dont know like 3-4 oil dealers have told me that already. What do you all run on your mustangs?
Att. Andrew
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 6:19:09 PM
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CrazyAl
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I am running the Ford-spec'ed 5W-20. (Mobil 1 if anyone cares).
All this talk about the Federal MPG initiative (or whatever the heck it is)--I don't buy it. Perhaps Ford did select this oil for that reason. But, I seriously doubt they'd risk warranty claims over engine damage becasue of it. I think it's a safe bet to stick with what Ford suggests.
By the way, I did use 5W-30 for my first oil change, becasue I couldn't get the 5W20 at that time. There was no noticeable change in power or MPG as a result of it. I'm back on 5W20 since then.
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 7:15:16 PM
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281GT
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The Ford modular engines use tighter clearances and wider bearings. They are specifically designed to use the lighter 5w20. Since the clearances are tighter you have less space for the oil and that's why Ford compensated by making the bearing surfaces wider. Less friction = better mileage and more power. Use a thicker oil and it ;s going to take more hp for the oil pump to push it though those tighter clearances. So unless you are running continuous high rpm for extended periods, live in an extremely hot climate, or have oil burning problems I would stay away from any oil which is heaver than what Ford recommends. 5W30 would not really cause any problems but you are throwing away a few hp for no reason.
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 7:16:30 PM
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jts
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Do you honestly think Ford would risk their reputation on just an
oil viscosity ??
5/20 is what's supossed to be used !
Everything else is just internet **** .
ok bullcrap
< Message edited by jts -- 9/3/2006 7:17:21 PM >
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 7:24:53 PM
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androdz
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any1?
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RE: 5w-20 oil? Keep or change to 5w-30 - 9/3/2006 7:36:29 PM
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MBDiagMan
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5W20 will give adequate protection for average engine life in average temperature climates. They do indeed use 5W20 for its fuel mileage advantages. They have to meet the Corporate Average Fuel Economy(CAFE) numbers or face severe penalties. There are lots of little things that add up to the fuel mileage they need. Things like 5W20 oil and aluminum hoods by themselves don't do much, but all added up makes a difference in fuel mileage.
Even in warm climates like here in Texas, 5W20 will give you enough protection for what most people consider decent engine life and will CERTAINLY get you past Fords 60,000 mile warranty period. If, however, you do live in a warm climate and want maximum engine life, you need to use a slightly heavier oil and change it OFTEN. I deal with 100+ degree heat here and do not settle for average engine life. I run my cars for extended mileage. The car I am replacing with my new GT has 298,000 miles and the one before that went to 533,000 miles. You can bet I will be doing all I can to see my GT go 300,000 miles or more. that means 5W30 Mobil One changed on a 5,000 mile interval.
My $0.02,
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