Anyone that have tested or know something about this? It seems to be possible to buy cheaper than HD syn3 here in Sweden..

"RevTech® Synthetic MTP
New from RevTech® is a lubricant so advanced, it provides superior performance in V-Twin motors, transmissions, and primaries. Our full synthetic base oil and proprietary RevTech® additive package provide viscosity stability, film strength, and anti-oxidation characteristics unmatched by conventional base oils. RevTech® Synthetic MTP is intended for use as motor, transmission, and primary case lubricant for Evolution® and Twin Cam 88® Big-Twin models. It is also intended for use as motor and primary case lubricant for Buell® and Evolution® Sportster® models. Consult your owner’s manual for proper fill capacities and drain intervals. When using RevTech® Synthetic MTP, do not top off with another lubricant unless RevTech® Synthetic MTP is not available, then change fluid as soon as possible.
RevTech® Synthetic MTP meets all warranty performance criteria for Harley-Davidson® motorcycles and its use does not void new vehicle warranties.
Sold in convenient resealable one quart plastic bottles with a transparent oil level gauge to show exactly how much oil has been used. Meets API CI-4/SL service levels.
635004 SAE 20W50 . . . . . . . . . . . . . . . . . . . . .$8.49 each"

I have been told by someone who knows:shhhh that Revtech is the company that makes oil for HD. So you are probably getting the same oil with a different label on it.