Oil & Flat Tappets

[Dynomite]

Originally Posted by We Gone

About $8-10 per quart, small price to pay for piece of mind.

I Concur

Engine............................................ ...................Transmission................... Differential

[Paul Workman]

Originally Posted by WVZR-1

The majority of the Mobil1 product purchased "across the counter" isn't in your "LINK"!

The product most see and I expect use is in the mobil1.us left column either the M1EP, or the next conventional M1, the rest is there also:

http://www.mobiloil.com/USA-English/...Oils/Oils.aspx

Yes, I believe the M1 product most find is there*. But! The point of the link was to illustrate the variety of Mobil 1 products. Simply recommending Mobil 1, or "I only use Mobil 1" is a little ambiguous w/o some clarification, I recon.

*But to your point, the third one down on the second page, one finds the M1 10/30 API SN. It seems if there is only one Mobil 1 product on the shelf, that is likely the one, I find. It "meets or exceeds requirements of all new car manufactures..." blah, blah, blah. Don't believe me? Check it out - you'll see.

I don't have to read about cam failure and lobes going flat: I have first-hand experience. I can't prove it was the low ZDDP content that caused the failure, but M1 and others have products with higher levels of the "good stuff" and specifically call out the fact it is intended for or suitable for flat tappet motors.

So, the thing I hope readers take away is the fact there ARE differences - even among Mobil 1 products, and there ARE products more suitable than others perhaps for the LT5, and it behooves one to know the difference and understand the importance, and to seek it out especially since the difference in cost is NOT the reason not to! Are there examples of LT5s that have survived on 800/900 ppm stuff almost exclusively? Yep. Does that mean it is OK for MY motor? Nope. Why not? Because oils with levels of phosphorous/zinc in the vicinity of 1200-1300 ppm were specified at the time the motor was in production. YMMV.

[LGAFF]

How many miles on the cam failure Paul?

[Paul Workman]

Originally Posted by LGAFF

How many miles on the cam failure Paul?

We don't know the exact miles, cuz the car came with that camshaft* installed. But, it was in the middle of the third driving season - probably under 6000 miles with her behind the wheel - when it suddenly began to loose power, and a couple outings after that, and it was done. (Had to be flat-bedded home).

*L46 motor (350/350) with hydraulic lifters, 4.11 diff gear, 4-speed M21 trans.

[LGAFF]

http://www.cranecams.com/pdf-tech-ti...failure811.pdf

[LGAFF]

I run the 15-50W Mobile One

[pantera1683]

Originally Posted by LGAFF

I run the 15-50W Mobile One

This is what I'm using for the summer. I use 0w40 in the winter.

[Jim Nolan]

I went with Mobil 15-50, years ago, on Aaron's recommendation when he did my porting. If you read the label on the 15-50 it says for high performance engines and contains anti-wear (zinc). Plus at Wal-mart you can buy it in 5 qt. jugs for $25 and change.

[Hog]

Hearing of cam failures on the LT5 with its lower OHC loading kinda freaks me out considering the old school SBC I have in the garage. Heck 1957 was the 2nd year of having an oil filter at all. Recommended oil change is every 2000 miles and a new canister type filter change every 6000 miles.

Plus I run a conventional oil as well. I need to do some research.

[Dynomite]

Originally Posted by Hog

Hearing of cam failures on the LT5 with its lower OHC loading. I need to do some research.

Just run Amsoil 10w40 and be done with it. Get it delivered to your door

I do what Marc Haibeck tells me to do except I kind of like a quicker oli filter drain back before removing oil filter (Mobile M1-207). I do not notice any lag in oil pressure on start up