[Dragncar]

Just buy some Shaeffers and be done with it. That make a oil for whatever you need.
1,000,000+ mile gasoline engines and 4-5 more HP on a dyno. What else do you want ?
Just put some in my Tundra and it had Wall Mart synthetic in it. The engine was noticeably quieter with the Shaeffers in it.

[locomotivebreath]

Originally Posted by Dragncar

Just buy some Shaeffers and be done with it. That make a oil for whatever you need.
1,000,000+ mile gasoline engines and 4-5 more HP on a dyno. What else do you want ?
Just put some in my Tundra and it had Wall Mart synthetic in it. The engine was noticeably quieter with the Shaeffers in it.

I tried the Schaeffer 5w50 and should’ve done the 15w40 . I really wanted their 5w50 to be my oil - but it was just too heavy for my hydraulic rollers . Too much pressure too . I shouldve known better and bought the 15w40 .

[GT182]

I don't know why people use 15W-40 in gas engines. It is a diesel oil. I used it in my 79 Formula because it was free from where I worked. We had to carry a couple of gallons of it in the trucks we drove. It ruined the engine.

And you don't see truckers put 10W-40 weight oil in their trucks. It would ruin a diesel engine.

[Dragncar]

Originally Posted by GT182

I don't know why people use 15W-40 in gas engines. It is a diesel oil. I used it in my 79 Formula because it was free from where I worked. We had to carry a couple of gallons of it in the trucks we drove. It ruined the engine.

And you don't see truckers put 10W-40 weight oil in their trucks. It would ruin a diesel engine.

Nope, Shaffers makes a 15-40 for gasoline engines. Its a racing oil but has plenty of detergents in it.

https://www.schaefferoil.com/race-oil-15w40.html

I have been running Dello 400 oil in a old beater Civic work rig for years and years. 300K and still kicking.
People have run Rotella 15-40 in street and race cars for a long, long time. Never ruined a thing. Whatever 'ruined" your engine I doubt it was the oil. I ran Dello 15-40 in my 455 bracket engine for several seasons. Engine is perfectly fine.
I mean, is running diesel oil the best way to go about it ? Nope, better choices out there. Engines will wear "slightly" more with a diesel oil but its not going to destroy your engine.

[Dragncar]

Originally Posted by locomotivebreath

I tried the Schaeffer 5w50 and should’ve done the 15w40 . I really wanted their 5w50 to be my oil - but it was just too heavy for my hydraulic rollers . Too much pressure too . I shouldve known better and bought the 15w40 .

I run 5-50 Shaeffers in my race engine. Solid roller deal, its all good.
But with straight 30WT break in oil my pressure was 95-100 lbs, too high. So I finished the break in with 10-30 Royal Purple and that brought the pressure down enough for me.
If I did not have .006 piston to wall I probably would just run their 10-30 or 15-40 racing oil.

Did your hyd roller lifter tick a bit with the 5-50 ?

[Kenth]

Dedicated diesel engine motor oils are for low revving truck engines.

[locomotivebreath]

Originally Posted by Dragncar

I run 5-50 Shaeffers in my race engine. Solid roller deal, its all good.
But with straight 30WT break in oil my pressure was 95-100 lbs, too high. So I finished the break in with 10-30 Royal Purple and that brought the pressure down enough for me.
If I did not have .006 piston to wall I probably would just run their 10-30 or 15-40 racing oil.

Did your hyd roller lifter tick a bit with the 5-50 ?

Yes , the HR’s ( older morels) where chattery and I had a slight tick at idle . It hurt to drain good Schaeffers with only about 150 miles on it ! I put Zrod 10w40 in it and all is good . Mobil 1 0w40 was quiet as well , I had that in over the winter . I’d probably be ok with 10w30 as well but my build sheet does say .003 on the rods . I remember the shop saying to use a 30 or 40 wt high zinc oil even with the roller he said .