Oil Grade for 1968 Harley Electra Glide

Oil Grade for 1968 Harley Electra Glide

RobertsHarley

Cle Elum, WA

#1 Jul 29, 2009
I just purchased a 1968 Harley FLH 1200 Shovelhead bike and researching the correct grade of oil for the engine and transmission. The 1968 manual states Grade 105 for above 75 degrees, Grade 75 for 75-32 degrees.

The Harley shop only sells 50w. Where do I buy Grade 75 and how does that translate to a w (weight)?

The manual also states to use the same oil in the transmission. The Harley shop recommends a Harley transmission oil.

I am not convinced I am getting the right information at the Harley dealership for my 1968 bike.
Scooter68

Etobicoke, Canada

#3 Aug 4, 2009
Hello Robert,

I too own a 1968 flh and I run a 50 weight synthetic all year round in the engine and 85 weight synthetic in the transmission. With synthetic oils it is less important to change weights as it gets hotter because synthetic oils have a stable viscosity. This means the oil does not thin out as it gets hot. If you run regular oil, you can run a 50W up to a 75W depending on where you live. Lucas makes a synthetic 50W as well as Royal Purple and probably a few others. You should join shovelhead.us/forum . A lot of good folks on there with a lot of great tips.
Anyway, I hope you enjoy your ride as much as I do and good luck. Regards
wade

United States

#4 Aug 5, 2009
that panhead needs 60wt engine oil for temps above 70 degree air temp. think for a moment, they no have synthetic when that bike was born. 50wt works when sustained temp is below 40 degrees air temp.
Scooter68

Etobicoke, Canada

#5 Aug 9, 2009
wade wrote:
that panhead needs 60wt engine oil for temps above 70 degree air temp. think for a moment, they no have synthetic when that bike was born. 50wt works when sustained temp is below 40 degrees air temp.
It's a generator shovelhead there fella not a panhead.
Scooter68

Etobicoke, Canada

#6 Aug 9, 2009
Hi again Robert,

You will get all kinds of differing opinions when you ask about oil. I am just telling you my experience with mine. Please do make your own decision. Another place to get information would be www.shovelhead.us/forum . Go there and sign up. Its free and there are people there that have forgotten more than most will ever know and they are more than happy to share information on this topic or any other on your bike. Good luck.
RobertsHarley wrote:
I just purchased a 1968 Harley FLH 1200 Shovelhead bike and researching the correct grade of oil for the engine and transmission. The 1968 manual states Grade 105 for above 75 degrees, Grade 75 for 75-32 degrees.
The Harley shop only sells 50w. Where do I buy Grade 75 and how does that translate to a w (weight)?
The manual also states to use the same oil in the transmission. The Harley shop recommends a Harley transmission oil.
I am not convinced I am getting the right information at the Harley dealership for my 1968 bike.
Bill

New Egypt, NJ

#7 Aug 10, 2009
use paint thinner will run better.

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