Oil Selection Article.........

[Marauderjack]

FWIW.......oil needs to get hot!!! :eek: :beer:

http://grassrootsmotorsports.com/articles/slippery-slope/

I'm going back to 5W30!!:bows:

[fastblackmerc]

FWIW.......oil needs to get hot!!! :eek: :beer:

http://grassrootsmotorsports.com/articles/slippery-slope/

I'm going back to 5W30!!:bows:

So what were you running?

[Marauderjack]

For the better part of 6 years I ran 5W30 Mobil I because Wally World here didn't have 5W20!!:shake:

Recently they have a "Go Green" attitude and now have 0W20 and 5W20.....I tried 5W20 with my new Oil Pressure sender and WOW.....80 PSI cold and 25 PSI Hot idle....evidently my sender was bad since 5W30 was only about 60 PSI cold and 15 PSI Hot idle!!:confused:

Anyway, I think I'd rather have a little more viscosity in my OLD, LOOSE motor and will see what the pressure is with 5W30 as opposed to 5W20 with the new sender??:cool:

The part about the lower viscosity was implemented so Manufacturers could reach fuel mileage standards ONLY was what I expected!!:rolleyes:

5W30 should lubricate as fast as 5W20 on cold startup and be a better lubricant hot!!:beer: Might even try 5W40!!:D

BTW, my oil temp has never reached their target of 212*!!!:shake: Mine runs about 180*-190*.

[RF Overlord]

'jack, thanks for posting the link to that article. The writer has obviously done his homework and did not just regurgitate the old wives tales.

I will take slight exception to the statement that lighter viscosity oils were introduced ONLY to help with fuel economy. Back in the "bad old days", heavier oils were needed to combat fuel dilution due to over-rich conditions caused by carburetors and to help maintain film strength needed by flat-tappet cams. Today's motors with fuel injection and roller cams or direct-follower cams like ours, don't need the higher viscosity. A lot of work was done, lead primarily by Ford, to bolster the quality of 5W-20 to be sure it would provide proper protection under most circumstances. The small fuel economy increase was a bonus.

Obviously in your case you can benefit from a slight bump to 5W-30, as do I with a blower on one car and 125,000 miles on the other.

[Marauderjack]

'jack, thanks for posting the link to that article. The writer has obviously done his homework and did not just regurgitate the old wives tales.

I will take slight exception to the statement that lighter viscosity oils were introduced ONLY to help with fuel economy. Back in the "bad old days", heavier oils were needed to combat fuel dilution due to over-rich conditions caused by carburetors and to help maintain film strength needed by flat-tappet cams. Today's motors with fuel injection and roller cams or direct-follower cams like ours, don't need the higher viscosity. A lot of work was done, lead primarily by Ford, to bolster the quality of 5W-20 to be sure it would provide proper protection under most circumstances. The small fuel economy increase was a bonus.

Obviously in your case you can benefit from a slight bump to 5W-30, as do I with a blower on one car and 125,000 miles on the other.

Agreed RF......my Cobra Replica with 408W uses 15W50 and it is set up with wider rod and main clearances and has a custom Holley 750 that pours gas to it......the thicker oil has to help with fuel dilution but I change it every 6 months or 1000 miles or so!!:beer:

Whatcha think about his reference to "ideal" oil temp being 212* or more?? I think it is in reference to moisture removal??:confused: I have only seen my oil temp go above 210* a couple times in really HOT weather!!:shake:

How long do you expect my OEM motor will live.....I expect it to "pop" any day but it keeps diggin'.....runs better than when new...still uses NO OIL between 5K mile changes!!:bows: