V twin 20w50 and auto 20w50 ?

[sloan2]

I'm leaving early in the am and was going over the bike and it needs some oil and no bike shops open this late would it be ok to put the auto 20w50 in:2thumbs:

 

[chainsaw]

I use 20w50 vavlelen racing oil in my big dog 107 tp motor I was told by my mechanic not to use synthetic oil in my motor chainsaw!

 

[woodbutcher]

I use 20w50 vavlelen racing oil in my big dog 107 tp motor I was told by my mechanic not to use synthetic oil in my motor chainsaw!

then why does S&S ship out their new motors with synthetic in them????????

 

[Vegas]

Any oil is better than no oil. A few ounces won't hurt.

 

[sloan2]

sounds good to me gonna put some mobil 1 20w50 in and change it to royal purple next oil change :2thumbs: thanks for the response. what is the difference between v twin and auto oil

 

[scubaman15]

The only difference in MC 20x50 and auto 20x50 is the mc oil has additives for wet clutch/and chain ...its really not needed in bikes that have a sep tranny/clutch but won't hurt . So it would be fine to use 20x50 val .. but I would add as I'm a Ammsoil fan to use synthetic as these oils resist over heating better and break down . And air cooled motors do heat up and can get very hot in traffic ! Just my two cents ... Royal Purple uses Molybdenum Disulfide (Moly and I'm not a fan of this " MO" remember "slick 50"? I won't get into the oil wars as this has been discussed before but hear.. a good link ..
Royal Purple vs AMSOIL

 

[BadBrad]

I'm new to Big Dogs, can you use syn oil everywhere?

Before I recently purchased my first Big Dog, I had a '92 Fatboy and used synthetic oil in the crankcase, primary and transmission. I've read a couple of posts where Big Dog owners use a different fluid for each. Is this the norm or just personal preference?

 

[woodbutcher]

Fluids!! - BIG DOG Motorcycle Forums

 

[zombie]

I have Mobil 1 synthetic 20w50 in my engine and primary without issue. I found it at walmart when needing to do a late night oil change and primary douche. I noticed on the back of the Mobil 1 carton they advertise as being the recommended choice for use in all S&S V-Twin motors.

 

[slamaking]

Here's an interesting read.

Testing Motorcycle Oil

Also check out AMSOIL's website for more info.