Rotella T6, 5w-40, 19 hours, Yamaha F115 outboard

[TOMJ]

Once again, I apologize that this was not posted in the preferred format.
I tried several times but just can not get it right.....

Shell Rotella T6 5w-40

19 hours in use

210 hours on motor

sample taken on 10-12-15 at oil change

no oil added between changes

aluminum 1
chromium 0
iron 4
copper 1
lead 0
tin 0
molybdenum 65
nickel 0
manganese 0
silver 0
titanium 0
potassium 0
boron 56
silicon 3
sodium 5
calcium 797
magnesium 1,241
phosphorus 1,097
zinc 1,299
barium 0

SUS viscosity @ 210*F 67.6
cSt viscosity @ 100*C 12.32
flash point 335
fuel 2%
antifreeze 0%
water 0%
insolubles TR
TBN 8.2

The 2% fuel was most likely due to extended cruising at low RPM before oil change.
I did run the engine hard for a few min right before changing the oil but the oil was barely even warm when I changed it.

 

[spasm3]

Looks like it could be run much longer!

 

[TOMJ]

Originally Posted By: spasm3
Looks like it could be run much longer!


Probably could have. This was one season's use.

I just don't like leaving used oil sitting in the motor for 5 - 6 months.

I'm just OCD that way.

Besides I like tinkering with my toys and the T6 and a Purolator filter are relatively cheap.

 

[CT8]

Originally Posted By: TOMJ
Originally Posted By: spasm3
Looks like it could be run much longer!


Probably could have. This was one season's use.

I just don't like leaving used oil sitting in the motor for 5 - 6 months.

I'm just OCD that way.

Besides I like tinkering with my toys and the T6 and a Purolator filter are relatively cheap.
I agree with the changing of the oil. Outboards are pricey. Do the lower end oil as well!! Do you need the 5W part of the oil?

 

[TOMJ]

Originally Posted By: CT8
Originally Posted By: TOMJ
Originally Posted By: spasm3
Looks like it could be run much longer!


Probably could have. This was one season's use.

I just don't like leaving used oil sitting in the motor for 5 - 6 months.

I'm just OCD that way.

Besides I like tinkering with my toys and the T6 and a Purolator filter are relatively cheap.
I agree with the changing of the oil. Outboards are pricey. Do the lower end oil as well!! Do you need the 5W part of the oil?


I did change the gearcase lube this past summer and will change it again next spring.
Yamaha recommends doing it twice a year just to make sure there's no water in there.

I'm going to take my first attempt at changing the water pump impeller as well.
Shouldn't be too hard.
I've watched a couple of videos on You Tube and it seems pretty straight forward.

And, no, I don't really need the 5w. I had thought about trying the Rotella 15w-40
but in my OCD mind, I think that the 5w-40 flows better at start-up.
And I swear that the engine just seems to run better with the T6 than it ever did using the Yamalube 10w-30 that I had used for years.