synth or semi

[blooozboy]

Hi Guys

Well what is he verdict for a WR 426 2002 I am using good quality Semi synth engine oil but should I be using Fully synth I do not ride hard but obviously want what is best for the motor,Your oppinions would be appreciated.

[clark4131]

With religious changing, you'll see no noticeable difference unless you break out your electron microscope and measure the wear in angstroms...SC

[byggd]

I run rotilla full synth. Good quality, range, and it's about $13 a gallon

[Joe Reitman]

I run rotilla full synth. Good quality, range, and it's about $13 a gallon

Same here - the SHell Rotella T is engineered for ultra high compression turbo'd diesel applications- very very heat and breakdown resistant. It is all I will run in my 20 psi 3 hp per ci turbo car as well.

[bg10459]

Great, another oil thread. Well then, since we're on the topic, is straight weight oil less susceptible to breakdown than multi weight oil? A post by grayracer suggests that the additives that make a multi weight oil break down very quickly in a wet clutch application. He seems to have the answers, but declines to divulge his choice (unless I missed something).

[tony1970]

The way I look at it if Yamaha thought you could safely run full synth in their bikes they would sell their own brand. I run semi now after I broke the bike in. From what I have read some people run full synth with no problems, the choice is up to you.

[tshe1]

I run rotilla full synth. Good quality, range, and it's about $13 a gallon

is it 15w40 or 15w50?

[ETP]

I switched from multi-weight to semi-synth because my clutch was coming out of adjustment on long slow continuous uphill climbs or boulder fields. I think its helping, but the clutch adjust still changes when worked hard.

[byggd]

is it 15w40 or 15w50?

I'd have to look at the bottle but if memory serves it's 5w40

[Joe Reitman]

I'd have to look at the bottle but if memory serves it's 5w40

I am pretty sure that is right

[Matty05]

5w40 is too thin for me!

I have to use 15w50 because it is about constant 90's here with 100% humidity all the time.

I use Motul semi synthetic 5100 bucause it costs me $50 Australian for 4 litres instead of $100 Australian for the fully synthetic.

I cannot justify the extra $50 when I have to look after 2 WR's and change the oil every 500 kms.

[crooks420]

Hey CLARK4131, will my SEM work?? Or do I need to get me a TEM??

Jesse

[clark4131]

Hey CLARK4131, will my SEM work?? Or do I need to get me a TEM??

Call up Lawrence-Livermore or JPL, they'll know for sure ...SC

[joshb]

I ordered a couple synthetic castrols to try out. Right now I run the $3 maxima premium or castrol $3 stuff. Is there any difference between this $3 stuff and the pennzoil from shucks?