We would all like to think that our motorcycles are engineered with the highest degree of technology available and, are built using the highest degree and tightest tolerances capable of the most modern and technically advanced machining processes available. This simply isn't true. It's simply an emotional response. What could be more perfect than this machine that I've lusted after ?
The truth is, designers and engineers of production based motorcycles must take into consideration the worst case consumer. They need to design their machines to function even when abused past there intended use. This results in looser machine tolerances than can be easily obtained by today's technology.
DESTRUCTIVE TESTING
All manufacturers, be it motorcycles or any mechanical widget, perform destructive testing. In the case of motorcycles, manufactures will take their motors and fill/equip them with the most common fuel/oil/filters available and run them until the motor fails. Many of the tests take neglect into account ( i.e. - low or no oil, bad filters, water in gas etc. ). The manufacturer will then make design changes and recommendations for the maintenance and care a consumer must take.
MAINTENANCE SCHEDULES / REQUIREMENTS WITH REGARD TO OIL
Recommended oil - Every manual for the motorcycles I've owed have specified a standard motor oil such as 10/40, 15/30, 20/50 depending on temperature of operation. As of late, only making recommendations to avoid friction additives for wet clutch applications. I've found that service intervals recommended by the manufacturer have been typically to long. However, these are based on their testing and will result in an engine that will perform adequately well beyond the motorcycles expected service life.
Filters - For the most part, I've found that manufacturers suggest changing the filters every other oil change ( air - clean and reinstall ). Most good filters cost between $8.00 - 20.00 so why screw around, just change them at the same time you change the oil. Crap in the engine is going to cause more damage than the molecular composition of the oil you use.
Synthetic Oil - Are you racing ? Have you done any engine machining ? Are you planning a cross country ride ? Do you plan on going 10,000 - 15,000 miles between oil changes ? Do you plan to keep your motorcycle for the next 30 years/ 200,000 miles ? If not, you most likely don't need a synthetic oil.
Validation - I think that all of us as riders, we are human after all, would like to think that after spending $ 70.00 or so for an oil and filter change ( $40. synthetic oil, $20. air filter, $10. oil filter ) obtained a remarkable performance change do to our extra effort and money. In reality we're most likely imposing our wishes and personal ego upon reality.
Disclaimer - I do use synthetics in my motorcycles. Do I think they do a better job...I don't know. I've rebuilt quite a few old bikes using standard 10/40, Mystery Oil, and PB Blaster. To be honest, I've never noticed a marked increase in performance with the addition of synthetics after restoring them to running condition.
If it helps you to enjoy your ride by switching to a synthetic oil...go for it. It sounds like good money spent. Whatever you use, I'd suggest that changing the oil and filters on a regular ( 3,000 miles ) basis would serve you better.
Then again, what do I know.
