what oil are you guys running??

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Mobil 1 15W-50 (has Zinc). Last oil change was just a couple weeks ago... ⚓
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scatpackbee said:
Joe Gibbs HR 10W30 synthetic oil.

I attended a seminar put on by the chief oil formulation engineer for Joe Gibbs and these guys know what is needed to keep a flat tappet cam alive in extreme conditions.
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I run Joe Gibbs in my circle track race car with NO ADDITIVES.

My street/strip car runs mobil 1 0w40 synthetic with NO ADDITIVES.
 
Valvoline VR1 20w-50. It has high zinc in it
 
Rotella 15W40 for more years than I want to admit,LOL... Never any problems and does not break the bank!

Dave,
 
abodyjoe said:
ok so i broke the cam in with comp cams break in oil.. then changed it and have fresh com cams break in oil in it for now.. i'd like to change it right before i leave for OCMD in early october.. not sure what to run..
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how aggressive is your cam and what is your spring pressure?
not a big concern if they are on the light side.
 
cam isn't anything crazy springs are basically stock 340 springs. with the time and money into this engine swap i'd rather be safe then sorry. a few extra dollars once a year on an oil change is cheap insurance to me.

thanks for all the replies.. i called and talked to the guys at joe gibbs and i like the hot rod oil they have..... has additives for cars like this they aren't daily drivers and sit most of the winter. also has the extra zinc for that protection.. i'll give it a try and see how i like it.. probably change the oil a couple days before i leave for OCMD.
 
Nobody has mentioned Mobil1 15w50 synthetic. Designed for flat tappet engines, 1200ppm zinc. Available off the shelf at O'Reilly's.
 
Save some cash and run the Defy.... Wal-Mart has it and requires no additive. Synthetic blend..Check this

Quaker State 10W30 Defy, API SL synthetic blend (lab tested 2012)
NOTE: An API SL rating is for 2004 and older automotive engines. This rating was replaced by the API SM rating at the end of November 2004, when the 2005 models were already available.

Silicon = 3 ppm (anti-foaming agent in new oil, but in used oil, certain gasket materials and dirt can also add to this number)
Boron = 170 ppm (detergent/dispersant, anti-deposit buildup/anti-sludge)
Magnesium = 8 ppm (detergent/dispersant, anti-deposit buildup/anti-sludge)
Calcium = 2652 ppm (detergent/dispersant, anti-deposit buildup/anti-sludge)
Barium = 0 ppm (detergent/dispersant, anti-deposit buildup/anti-sludge)
Total detergent/dispersant (anti-deposit buildup/anti-sludge) = 2830 ppm
Zinc = 1221 ppm (anti-wear)
Phos = 955 ppm (anti-wear)
Moly = 99 ppm (anti-wear)
Total anti-wear = 2275 ppm

10W30 Joe Gibbs HR4 Hotrod Oil = 86,270 psi
(16.9% below no.1)
zinc = 1247 ppm
total detergent = 3134 ppm
detergent ppm/zinc ppm ratio = 2.5

15W50 Mobil 1, API SN = 70,235 psi
(32.4% below no.1)
zinc = 1133 ppm
total detergent = 1437 ppm
detergent ppm/zinc ppm ratio = 1.3


10W30 Royal Purple HPS (High Performance Street) = 66,211 psi
(36.2% below no
zinc = 1774 ppm
total detergent = 3676 ppm
detergent ppm/zinc ppm ratio = 2.1

Super High Camshaft ZINC oil is available and very important for newly rebuilt engines with new flat tappet components


detergent ppm/zinc ppm ratio = 2.7
 
I use Lucas 10/30 Hot Rod Oil. 2400 PPM of zinc and is about 27 bucks for a five gallon jug from Summit.
 
Lucas has some of the highest zinc ppm levels in their oil.
 
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back in the 80's cam failure was high and the reason was bad manufacturing.At the same time it was discovered that hi zinc in motor oil was creating combustable by products that damaged catalytic converters...so levels of zinc were lowered in motor oils.
...this suggested that cam failure was due lo zinc levels. and when manufacturers started going to roller lifters to improve efficiency and mileage it was thought that because zinc was removed to prevent catalytic failure that manufacturers went to roller lifters to prevent cam failure.
as soon as hot rodders thought lo zinc was causing cam failure ...dollar signs appeared and a whole industry exploded around hi zinc oils and zinc additives....
now most seek out zinc in some form or another "just in case"
..I wonder what the real story is?
 
Royal purple break-in for my new cam then their HPS 20w50.

And now for something completely different.

The engines we build for our drones get the Joe Gibbs break in oil, then they get the Joe Gibbs 15w50 after break in. Aircraft endurance is about 16 hours and the oil is changed out after every flight.

P.S.
Yes, that's a B block in the trunk of my 68 fastback.
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New MRL Peformance 360 currently getting installed. I'm going with Lucas Hot Rod 10w-30
 
Crisco vegetable oil

Then you can see when it needs changing when its no longer clear
 
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