http://www.mobiloil.com/USA-English/...in_20W-50.aspx I use this, it works good and I can get it at many different places if needed.

 

Go with Mobil 1. I've ran it for 25+ years in everything I've owned and I believe it's the best syn you'll find. I bet you can find it in Bulgaria too. By the way nice looking bike.

 

Thanks guys.

 

x2 on Mobile 1.

 

I'm using http://www.dynacycleoil.com/ I liked the technical specs and testing they have.

Other posters have said it's Apples and Oranges though.. I believe in the data..

 

Oil, ARRRGH. But just for the record. Would you run gear oil in your engine? Then why would you run engine oil in you gear box? I have always run 20/50W in the engine and primary chain case adn a 75/90W gear oil in the transmission. Stick with the high end synthetics. I have used Mobil One in cars for years, and never had a oil related failure. I have run Royal Purple and Amsoil in bikes with no problems. For the record my 08 Street Bob ran 8 degrees cooler with Amsoil than Royal Purple, and with the preferred customer status, Amsoil was cheaper. Go to the Amsoil site download their white paper on oil. It was done by an independent lab and they rate all the oils. I would stay in there top three.

 

I got a 2010 fxdc, and i want to change the oil in all 3 holes. Dealer say's i have to use formula + tranny and primary lubricant in the tranny and primary,is this true ? It say's on the screaming eagle oil bottle that it can be used in all 3 holes,but i want to use mobil 1 v twin 20w 50 in all 3 holes,anybody out there useing mobil 1 or screaming eagle in all 3 holes. Thank you.

 

I am using Screaming Eagle Oil in all 3 holes for a few years with no issues.

 

It's because the SE is synthetic, and the other oil is fossil. When using a full synthetic, the synthetic can be used in all 3 holes.

Fossil requires different lube for different holes. (Dang, that's funny!)

 

Engine = Mobil 1 20w-50 V-Twin
Tranny = Mobil 1 75w-90 Gear Lube
Primary = Mobil 1 10w-40 MX4T

All synthetic and use a Harley Oil Filter.