Just Sayin, Link?trade dispute panel had ruled in shell oil company's favor allowing shell to label their T6 5w40 'synthetic'. their ruling was based on the word 'synthetic' on the jug as being a 'marketing' term and not a 'chemical' makeup term of chemistry. some other oil makers have also followed suit and use the word 'synthetic' on their jugs based on the trade panel's ruling and some other oil makers are actually making their oil of a true synthetic chemical base formula. I think the trade panel has left it up to the consumer themselves to know what they are buying. marketing lawyers won, chemists lost, just sayin'
I believe the lawsuit was Mobil 1 vs Castrol.trade dispute panel had ruled in shell oil company's favor allowing shell to label their T6 5w40 'synthetic'. their ruling was based on the word 'synthetic' on the jug as being a 'marketing' term and not a 'chemical' makeup term of chemistry. some other oil makers have also followed suit and use the word 'synthetic' on their jugs based on the trade panel's ruling and some other oil makers are actually making their oil of a true synthetic chemical base formula. I think the trade panel has left it up to the consumer themselves to know what they are buying. marketing lawyers won, chemists lost, just sayin'
That is the point you don't, I run Rotella T6 5W-40, does great.The main difference between motorcycle oils and automotive oils is (supposedly - see the next paragraph) the amount of ZDDP (Zinc Dithiophosphate) and the addition of friction modifiers to auto oil. ZDDP acts as a last gasp measure to reduce wear of metal on metal. What this means is that as the oil breaks down, it provides less lubrication. ZDDP extends that protection a little longer than the oil would otherwise provide. With the advent of synthetic oils, especially fully synthetic oils, ZDDP is less necessary unless you do not change oil often enough. It still helps to reduce metal on metal wear, but it is not nearly as important as it used to be if you are using a synthetic oil. It is very important if you still run a traditional oil and go more that about 3K miles between oil changes.
ZDDP concentration in oil is regulated. It causes damage to catalytic converters. Many motorcycles have catalytic converters, so it is regulated to the same extent for motorcycle or automotive oils. It has been a few years so I don't have any links, but I saw the data from testing of a number of auto and motorcycle oils. The amount of ZDDP within a brand of oil and type (traditional or synthetic) was pretty consistent without regard to being auto or MC oil. The main difference between the auto and MC oils was the friction modifiers.
It sucks that we have to pay more to have friction modifier additives left out.
I would be really surprised if it does, main thing is how it holds up under motorcycle wear and tear, bikes put a pretty good shear on oil. Look forward to seeing what you find out.Answering the OP's question: I just changed to Mobile 1 V-Twin 20W50 synthetic. Using it here in Texas this summer to see if bike will run a few degrees cooler vs conventional. Not expecting anything drastic, but maybe a couple of degrees. We will see.
I have had bad results for other Shell Rotella versions in the past with another bike. T6 may be better than the ones I used, but I don't care to risk their products again. I like Royal Purple, but they do not have 10W-40 or 20W-50 without friction modifiers except for the MC versions. My opinion, but I don't think 5W-40 provides adequate cold cranking protection unless a vehicle has been specifically designed to use an oil with 5W cold viscosity. Oils with cold viscosity that low do not leave enough of a film on surfaces when the engine cools off. Like I say, that is just my opinion.That is the point you don't, I run Rotella T6 5W-40, does great.irate:
I have had bad results for other Shell Rotella versions in the past with another bike. T6 may be better than the ones I used, but I don't care to risk their products again. I like Royal Purple, but they do not have 10W-40 or 20W-50 without friction modifiers except for the MC versions. My opinion, but I don't think 5W-40 provides adequate cold cranking protection unless a vehicle has been specifically designed to use an oil with 5W cold viscosity. Oils with cold viscosity that low do not leave enough of a film on surfaces when the engine cools off. Like I say, that is just my opinion.
Respectfully, I totally disagree.Whut??????? Engine off, no pumping, Oil hanging on to parts for dear life waiting for next crank over... film strength of straight 50 vs 5w would be about the same after a couple of days. There is no oil there. Sha-boom. Fathom that.