Topic: Motor oil & fuel additives

[Dustin Arnett]

Hey guys, I've got a couple questions.. What motor oil should I use in my flat head straight six? Also does anyone use led fuel additives? Does it matter what kind of octane I put in it? For my coronet with the "baby Hemi" I used diesel motor oil, I forget the name of it. I was told it help burn off the carbon deposits on the heads or something or other..... Hahaha I forget, but it sounded good at the time.... Thanks

[Greybeards Customs]

as far as fuel goes I'm sure regular is fine because they were not high compression engines . Shell makes a very good  oil for gas and diesel engines that a lot of people use in everything .As for a lead substitute I have never used anything in my engines and never had valve wear issues and they are all pre-unleaded engines . I'm sure it couldn't hurt though . I do use 104+ ultra octane booster because of the blower , it will ping with 93 octane without it .

[Kenney]

Greybeard is right. Shell Rotella is good all around motor oil. Chevron and Union 76 were also a good diesel oil and was comparable to rotella. Just have to watch some of the newer diesel oil. They are putting in less of the anti wear additives like car oil. All newer cars have roller cams so it is not as critical. Diesels have used roller cams since way before car manufactures even thought it. On  my flat tappet engines as added protection I always add a 12 oz bottle of comp cams break in lube.
If you want to run something in your fuel what I used to do in my alcohol engines was run Klotz top end lube. Alcohol is alot drier than gas, in other words it has no lube.

[Dustin Arnett]

Thanks guys.... Rotella is what I was using on the Coronet. I'll stick with that.....

[tattoodaddy1967]

I have always used Shell Rotella 15-40 in everything since I owned my Kenworth back in the day.