What type of oil are people using,1975 shovelhead ,at the moment i have 25/60 in the motor,#30 in primary,temp here are constant,68F 75 F.Just did a complete rebiuld.Harbri

 

if that works for you and than that fine

i would use ATF trans fluid in the primary as motor oil on the clutch with the type of paper they use today, will make netural a thing to get

 

What is 25/60 ?

For a shovelhead always use straight weight oil in the motor , 50 is ok for your temp range if it get over 90 go to 60 and what John said either dextronII ATF or primary oil in the primary and you only need about 1/3 qt .

 

Always used SAE60 in the summer, SAE50 in the winter in my '78 FXEF. Primary oil in the primary. Also made the mod to the primary chain lube orifice tube so the oil actually squirts on the chain and not out to the inside of the outer cover.

 

Use straight HD 60 wt unless you ride where the temps drop below 35-40 degrees, then use HD 50 wt.

If your primary isn't isolated, don't worry about adding oil to the primary, it'll be lubed from the motor oil. If the primary is isolated and running a primary chain just add a few oz of your motor oil.

The way I see it. The oil is the blood line of any motor. The stock shovelheads were born and raised on Harley Davidson 50wt or 60wt oil. So why would someone wanna play Russian roulette with a stock shovelhead to save $4 to $12 on oil ?

 

[QUOTE=LilRosie;11187102]Use straight HD 60 wt unless you ride where the temps drop below 35-40 degrees, then use HD 50 wt.

If your primary isn't isolated, don't worry about adding oil to the primary, it'll be lubed from the motor oil. If the primary is isolated and running a primary chain just add a few oz of your motor oil.

The way I see it. The oil is the blood line of any motor. The stock shovelheads were born and raised on Harley Davidson 50wt or 60wt oil. So why would someone wanna play Russian roulette with a stock shovelhead to save $4 to $12 on oil ? [/QUOT


That is true till the oil became a much better product-- than Harley switched to 20/50 in the early 80s and never look back

 

Here in centro america all i can get that is close is castrol 25/60,,i can not get a straight weight 50 or 60.

 

castrol 25/60,its all i can get that is 60 weight in costa rica.

 

25/60 is not sold in the US, but is sold in country's that are not controlled by the EPA, and still have a lot of air cooled cars...which it is designed for...I would say it would be just fine for a shovel...and if it was available here you might look at using it yourself...because it surely has all the nasty additives you can no longer sell in the US...but motors love...I say use it.

 

KOOL Learned something today and that makes it a good day I had no idea they even made it . I'll look into that with all the newer tech inside this 93" I've been using 20/50 but she does get a bit warm when it goes over 90 out here . Can't use straights anymore .