Hello! I have install big bore 124 .Before and now i am using SYN3 but not sure that it is the best solution. I would like know what kind of oil better use and what you are using ?
I am living in the hot area in Spain and after change in my engine have a doubt with SYN 3.
Thank you!

 

You’re going to bring the wrath of the forum down upon yourself, starting what is commonly known as an “oil thread”.

Everyone has, often vehement, opinions on oil.

I personally use Red Line v-twin synthetic, just from tradition, because that’s the brand I’ve been using in all motors for the past 30 years. However I am also under the strong opinion that any good quality full synthetic is all the protection a motor needs, In fact, regularly changed standard oil is really all a motor needs, but I like the piece of mind the additional high temperature tolerance and protection full synthetic provides.

And Syn3 is also perfectly fine...

Also, you didn’t mention what bike you are talking about, but if a touring, I’d recommend the fan assist oil cooler. It’s additional (relatively) cheap protection esp. in your hot environment.

 

what Mchad said about the fan assist oil cooler..I think it's one of the most valuable accessories they ever offered for an air cooled engine considering it can lower the engine oil by up to 50 degrees as stated anyway...any proper 20W50 is good for your engine and change at appropriate intervals

found this interesting from Fueling

https://www.feulingparts.com/product...p?product=3087

TECH TIP: Feuling highly recommends staying off the rev limiter and running conventional oil in the M8 engines to help maintain ring seal and minimize blow by.

I personally haven't ran synthetics for my own reasons but this is sure to illicit some 'passionate' responses

 

Sorry . I have Street Glide Special 2017. Thank you for your advice Mchad.The fan assist oil cooler i have. After rebuilding the temperature of engine a litle high then before and more noisy. I whant throus yours American forums where Amecan people use Harley to find the best solution for my bike .

 

https://www.amsoil.com/shop/by-equip...ed//?zo=331384 Alex, This should take you to a video link I hope. Not sure if you can find AMSOIL in Spain.
Dutchy

 

I just completed my 124 build and noticed the same. What temperatures are you seeing?

 

I have electric probe for oil in engine . The temperature of oil approximately 10-15 C more then before. But it not correct I know. Going to check with PV .