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2008 Yamaha F350 91 Hrs OCI #5143164
06/24/19 08:39 PM
06/24/19 08:39 PM
Joined: Aug 2009
Posts: 24
Maryland, USA
nicklx Offline OP
nicklx  Offline OP

Joined: Aug 2009
Posts: 24
Maryland, USA
Hey folks,

Decided to try a different oil to combat the low viscosity that I was having with the Yamalube 10w-30. Went with West Marine 4 stroke 10w-40 this time. Unfortunately, I don't think the large amount of idling we do helps these motors, but its the nature of our work. Never noticed a significant rise in the oil level of the port motor though. I did skip doing an analysis on the last oil change as it was a short interval and went ahead and did this latest one which was closer to 100 hour interval.

[Linked Image]
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01 VW Jetta GLS 1.8T
98 BMW M3
04 Passat 1.8t (Currently Rebuilding)
Re: 2008 Yamaha F350 91 Hrs OCI [Re: nicklx] #5143298
06/24/19 11:33 PM
06/24/19 11:33 PM
Joined: Jul 2008
Posts: 1,070
Maryland USA
rubberchicken Offline
rubberchicken  Offline

Joined: Jul 2008
Posts: 1,070
Maryland USA
I am not impressed with any West Marine 4 stroke oil. If it were mine, I would probably use Amsoil 10w40. Do you do a lot of trolling ? The Fuel and flashpoint are a bit off- perhaps a checkup of your ignition is in order. Maybe a badly gapped plug, or a coil that is marginal.

Re: 2008 Yamaha F350 91 Hrs OCI [Re: nicklx] #5143677
06/25/19 12:02 PM
06/25/19 12:02 PM
Joined: May 2012
Posts: 6,709
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline

Joined: May 2012
Posts: 6,709
Fort Lauderdale, FL
Marine engines get hit from both sides with FD issues. High load and rpm does it. Idling does it. Marine engines spend most of their time either idling or at higher load and rpm.

At least this oil hung on pretty good, and wear metals got a tick better.

07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
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