I've been using Mobil 1 v-twin 20w 50 oil as my engine oil with great results.....I've been reading
that it can be used as a primary oil......can I?
Any input would be great

Thanks in advance.
John

 

You can use it in all three holes, but there are better alternatives. I use Formula+ in the transmission and primary. Harley just came out with Heavy Synthetic Gear Oil. I'm thinking about giving it a try next oil change.

https://www.harley-davidson.com/stor...-gear-oil#tabs

 

Harley in the last few years went back to Formula + in transmission and primary. You do not want high detergent additives in oils in boxes without a filter. Not an oil thread comment. An engineering one.

 

I'm inclined to go with gear oil next change. But yep you can sure use Mobil in there as well.

 

+1

 

Mobil 1 4T is better suited if you read their literature

 

Another oil thread so I’ll chime in.
I use Mobil 4T synthetic because it is JASO approved for motorcycles that have 1 chamber for engine, transmission, and wet plate clutches. Available at Walmart and auto parts chains. Used it in Yamaha motocross bikes for years.
Mobil V-twin in engine.
https://mobiloil.com/en/motor-oils/m...motorcycle-oil

 

Ive been using Mobil 1 20w 50 in my primary for a while now.

 

Mobil 1 4T in the primary for me as well.

 

Formula + in the primary and transmission for 107,000 miles and zero problems.
There might be better lubricants out there for the purpose but I'm sticking with what's been working. If it ain't broke, I don't have to fix it...