(06-10-2023, 11:22 PM)m in sc_imp Wrote: ive run it with excellent results, oil changes in my ducatis were in the 100 each range using motul 300v, at 12000 miles when i did the belts and desmo adjustment there was zero wear or adjustments noted in the topend, and i did all the work myself.
i can't comment on rotella t5, it was designed for diesel motors, and does work fine by reports in other peoples bikes, so im sure its fine. Me? i run castrol synthetic motorcycle oil in the cb. anytime you do an oil change you will feel a slight performance increase right away. the reality is, ANY modern 4t motor oil is going to be good as long as it can be used on a wet clutch.
my take is i dont care about cost overall. the castrol stuff is about 8-10 bucks a quart and is fine.
the rotella is even cheaper and is fine. the 1 upside it has is zinc, which is good.
whats the point? it really doesnt matter in the cb from the choices mentioned in this thread, all will work just fine.
The point for me is that my dealer wanted $100 for a GN4 oil change, so I had to learn to do it myself.
In the process of learning to do it myself, I discovered that the quantity of oil listed in the manual, 4.2 gallons, is WRONG.
The correct amount, with filter change, is between 3.8 and 3.9 quarts.
It's not a rounding error or a "with or without filter" difference, the MOM (manufacturers owners manual) is simply incorrect. The first oil change I had done at the dealership, and they overfilled it too.
Also, I discovered that Bosch 3300 premium filters will not fit the CB1100 due to the shape of the filter screen where it contacts the engine block.
So the dealer wants a fortune for sub standard oil, the manual is wrong regarding oil quantity, and the shape of the engine block is unusual, meaning that not all filters that spec the same as the OEM Honda filter will actually fit.
The Castrol 4T synthetic might be great oil, but it's $12 a quart near me. That's more than twice the price of the Rotella.
The Rotella T5 10w30 is not only less expensive than Honda GN4 10w30, it's a better quality oil.
I'm also using the Fram PH6607 filter. Dealership wanted $20 for a made in China Honda OEM filter. The Bosch 3300 is $6 but didn't fit... The Fram PH6607 is $7, has a silicon drainback valve, and is made in USA. Fits fine.
Some folks are perfectly happy to pay extra money and not have to think about it. My experience is that even paying extra money, that's no guarantee. You are likely to have to think about it eventually.
On my journey to the Rotella T5, I had to think a little for myself but now I have a better quality oil at a much lower cost.
And the correct quantity in my sump too!
(the Shania Twain reference was removed so this doesn't make too much sense).
