I did a google search titled "should I use 5w 20 oil, it took me to a site called "synlube" they had a very lengthy article on the oil, it started with one sentence, 5w 20 oil will give you 1% more gas mileage and 30% less engine life. Here in Texas with the hot weather I use 5w 30 and found that the dealer I purchased the 06 GT from also uses it even though it says use 5w 20 on the fill cap.Any thoughts on this......
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Just me
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Once it breaks freezing, I plan to switch to 5w30. I live in ND, so it's still really cold. I can't imagine what problem would occur from running slightly thicker oil....especially in warm climates.
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'06 Black GT 5spd - Tint
Custom AB's - Bama 92
Tune w/ JLT II CAI
Here's the way I see it after thinking about this for a few years, LOL! If manufacturers recommend an oil such as 5W20 for "fuel economy" is must reduce friction. If an oil itself can improve fuel economy, it can only do it by 1)reducing friction or 2)increasing piston seal. A "thinner" oil, could possibly increase piston/cylinder sealing by getting to places that a "thicker" oil can't but more likely it reduces friction by the same manner.
Now if you're reducing friction to gain milage then you must be increasing Hp too, also by reducing friction. Thus synthetic oil's, such as RP,claim of increasing power also. I don't see how reducing friction can shorten an engines service life, especially not by 30%! Also if a "thinner oil" has greater "pumpability" on start up, it must reduce the initial friction at startup where most engine wear occurs.
So as I see it 5W20 = increased mileage which must = reduced friction which = increase power and = less wear.
Now, I'm no engineer but I do know what makes sense, and this seems to be the most logical conclusion I've come up with with my little brain. So I would say stick with the manufacturer's recommendations unless you have proof that "thicker oil" will be superior.
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05 GT Vert Auto, Saleen S/C 3.2 pulley, JDM tune, Roush springs, D-Specs, Steeda LCAs, Swaybar, Panhard bar & brace, Spydershaft, TruTrac, 3.73s, BBK shortys,MRT H-pipe,Corsas, Hawks & other stuff!
I wish there was some sound advice on this subject. I've read that Ford did it to increase gas mileage and i've read that the tight tolerances of the 3V requires a thinner oil.[:@][:@][:@][:@][:@][:@][:@][:@]
As you can see i'm kinda mad about the whole thing. I'd like to know the truth so I can sue Ford when my engine dies prematurely.
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whipple HO SC,FRPP springs, Pypes mid mufflers, Che adj. LCA, hurst, 4.10's, 1 piece DS, spec stg 2 clutch. Accel coils 12.52@117.6mph so far with a 2.01 60 ft time(pre shaft, coils, clutch).
If ford says use 5w20 then i will have no problem using it. Its not like they decided on this by discussing it with a homeless dude on the corner for 5 minutes or something
Here's the way I see it after thinking about this for a few years, LOL! If manufacturers recommend an oil such as 5W20 for "fuel economy" is must reduce friction. If an oil itself can improve fuel economy, it can only do it by 1)reducing friction or 2)increasing piston seal. A "thinner" oil, could possibly increase piston/cylinder sealing by getting to places that a "thicker" oil can't but more likely it reduces friction by the same manner.
Now if you're reducing friction to gain milage then you must be increasing Hp too, also by reducing friction. Thus synthetic oil's, such as RP,claim of increasing power also. I don't see how reducing friction can shorten an engines service life, especially not by 30%! Also if a "thinner oil" has greater "pumpability" on start up, it must reduce the initial friction at startup where most engine wear occurs.
So as I see it 5W20 = increased mileage which must = reduced friction which = increase power and = less wear.
Now, I'm no engineer but I do know what makes sense, and this seems to be the most logical conclusion I've come up with with my little brain. So I would say stick with the manufacturer's recommendations unless you have proof that "thicker oil" will be superior.
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whipple HO SC,FRPP springs, Pypes mid mufflers, Che adj. LCA, hurst, 4.10's, 1 piece DS, spec stg 2 clutch. Accel coils 12.52@117.6mph so far with a 2.01 60 ft time(pre shaft, coils, clutch).
Ford recommends 5-30 in other countries. 5-20 absolutely has been proved to be adequate. You can read all about it on www.bobistheoilguy.com. Also, I vote for Redline oil too.
5W 20 OIL
