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No discussions on oil lately. So maybe time!!!

There is a spectrum between 'Failure' and 'Optimal'. I think this is where a discussion on lubricants is valuable.

Yes.
Quality brand
Viscosity appropriate for ambient
Change before particle suspension is heavy (oil analysis or no, 9,000 miles is a concern)
 
Yes.
Quality brand
Viscosity appropriate for ambient
Change before particle suspension is heavy (oil analysis or no, 9,000 miles is a concern)

:agree:

There are some very interesting aspects to this which have never been (nor will likely ever be) addressed.

The service interval on the 998 V-Twin has always been 4,500 miles from the beginning. This makes perfect sense when using the BRP lubricant because innumerable tests consistently show it begins to shear and lose viscosity in a steep decline at this mileage.

Fast forward to the 1330 triple. Same oil, same steep decline in viscosity at around 4,500 miles. But a magical service interval of 9,300 miles. This means the typical 1330 owner is running 20 weight oil for close to 5,000 miles between each service.

Now, to be fair, there have been, to my knowledge, no 'Engine Failure's' reported, as mentioned in a previous post. So, does this mean that the 1330 is fine with 20 weight oil? If so, why not spec. a 20 weight oil to start with? And why continue to recommend a 4,500 mile service interval for the 998 V-Twin if running at 20 weight is a good idea?

Granted, we are talking just a bit of apples and oranges here, since we've got 2 different engines. But you can't escape the fact that the lubricant performs pretty much identically in both systems.
 
...Has anybody ran their oil for 9k miles?

I do it every oil change with Amsoil Metric Full Synthetic 10W-40. Here are all the analyses I have had done. The first one with Amsoil had excess condensation because my winter morning trip to/from the gym was too short for the oil to fully heat up so I tripled the distance in the subsequent analyses.

Capture1.jpg Capture2.jpg
 
...The first one with Amsoil had excess condensation because my winter morning trip to/from the gym was too short for the oil to fully heat up so I tripled the distance in the subsequent analyses.

Very good excuse for a longer ride!
When I had my Sportsters, it was only 7 miles to my shop.
In SoCal winters, oil barely got to 155 F in the mornings...so I left earlier and took longer ways to work.
 
I have let mine run to the once a year mark because I was driving fewer than 9,500 per year. Now that I am going to surpass 9,500 per year, I will probably change out somewhere around 6500-7500 miles. It all depends when I want to make a special trip to Nixa MO or Pearcy AR.
 
Very good excuse for a longer ride!
When I had my Sportsters, it was only 7 miles to my shop.
In SoCal winters, oil barely got to 155 F in the mornings...so I left earlier and took longer ways to work.

I spoke with the analyst who did that sample and he said it was kind of common in motorcycles during winter months.
 
So, does this mean that the 1330 is fine with 20 weight oil? If so, why not spec. a 20 weight oil to start with? And why continue to recommend a 4,500 mile service interval for the 998 V-Twin if running at 20 weight is a good idea?
Without consulting with the engineers, we can only conclude that it is fine with 20w oil.

If you specified a 20w to begin with, what guarantees do you have that it won't shear down to 10w or less?
THAT is why something heavier than 20w is specified. I would have to guess that somebody did some testing and found that 20w was adequate for the engine. Some further testing found that 40w sheared down to 20w after a few thousand miles, so they said, "Let's insist on 40w oil, but make it 5w-40 so it flows well when cool, too."

As to why the 998 has a shorter interval, sorry, I don't have a clue.

.
 
I'd really like to see an oil analysis of Amsoil/M1 10w40 or Castrol 10w50 after a BRP stated 9000 mile run time. Has anybody ran their oil for 9k miles?

I do when I ride more than 9000 in a year. Do to medical crap I didn't get 9000 last year so I changed oil and filter in the spring. I also run my Tacoma to the recommended 10,000 miles between changes unless I have been doing off road or
other severe duty. All of my vehicles get fluids and filters changed at the factory recommended time or mileage.
 
Failure would be running an oil burner and not checking the oil level.

Longevity/durability is the question. Which is why I prefer to change oil on an 8000 RPM engine sooner than BRP recommends.
 

Would it work? I'm sure it would. It is JASO MA/MA2 rated. As above, being a mineral oil, I sure wouldn't run it more than a couple/few thousand miles. BRP recommends semi/syn blend oils, and I have to believe a lot of that has to do with their recommended oil change intervals. No way would a mineral based oil be good for that amount of miles. Heck, if being frugal, spend $20 from Walmart and get a jug of Shell Rotella T6 15w40. It is synthetic, and also JASO MA rated.
https://www.walmart.com/ip/Shell-Ro...iesel-Motor-Oil-SAE-15W-40-1-Gallon/869812640
 
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