Originally Posted by TimVipond
How many miles have you ridden on API SM oils? None.
Wrong! I ran Castrol Syntec for over 60,000 miles, and here is the Castrol information:
Provides superior oil film strength and extreme high temperature protection. Exceeds all car and light truck manufacturer's warranty requirements for the protection of gasoline, diesel and turbocharged engines where API SM, SL, SJ, SH, CF or CD is recommended. Exceeds European ACEA: A3, B3, B4, and the engine protection requirements of GM 4718M, ILSAC GF-4 for API Certified Gasoline Engine Oils.
Notice the API ratings includes SM,SJ, and SH.
Car/truck oil formulations change all the time. These are not tested on motorcycles. If you can find someone that has 100's of thousands of miles using these API SM oils at 6,000 mile oil change intervals on a K1200LT, then I will reconsider my position.
Exactly my point. Neither can you find evidence of an oil related problem on LTs with hundreds of thousands of miles. Without a demonstrated problem, there is nothing to "fix".
How many oil companies recommend and warranty car/truck oils for BMW K1200LT's. None. They don't want the liability. They know that motorcycle oils and car/truck oils are formulated differently. Car oils have reduced metal protecting additives, because they can poison catalytic converters.
Then we should poison the LT's catalytic coverter with oil that has higher volume of "metal protecting additives"?
Have you ever asked BMW if they will warranty the K1200LT if you use car/truck oils? No? Why not? Why doesn't the 2006 BMW K1200LT list SJ, SL, SM oils? SJ has been around since 1997, SL since 2001, SM since 2004. It is because car/truck only oils with these API classifications are not optimum for use in the K1200LT. What is it that you know that the oil and BMW engineers don't know?
BMW does warranty repair engines that use oils that have SG/SH ratings included in the ratings, no matter if it is "motorcycle" specific or not. Of course the real fact is that warranty repairs on BMW engines will be done and the oil used not even questioned. If someone can point to a warranty repair where BMW even asked what kind of oil was used, it would be a rare instance.
I got this quote the other day and it seems to fit here:
WORDS OF WISDOM
“It is unwise to pay too much, but it is worse to pay too little. When you pay too much, you lose a little money – that is all. When you pay too little you sometimes lose everything because the parts or labor you bought was incapable of doing the job it was bought to do. The common law of business balance prohibits paying a little and getting a lot – it cannot be done. If you buy from the lowest bidder, it is well to add something for the risk you run, and if you do that you will have enough to pay for something better.”
1819 - 1900
We will be in total disagreement on this for life Tim. Being an engineer by trade, I will believe in what I can see from actual empirical evidence far more than someone's "projected possibilities" based on data not backed up by factual evidence. Problem is that there are very many thousands of "K" Brick engines that have ben used in motorcycles for three decades now, with proably few engine failures of any kind, and I doubt if even one failure can be factually related to oil type/brand used. Going far too long between changes, oil pump/regulator failures, or running them low on oil, certainly; but that has nothing to do with type or brand.
I think you are trying very hard to sell a fix for a "problem" regarding the LT that just does not exist to an extent warranting the slightest bit of worry about it. The new BMW transverse K engines though, another matter entirely. If I get one of those, I will use Motorcycle specific oil. Another LT though, nope.