Oil consumption questions

[Dimebag]

Hi, a general engine oil consumption for the experts..

After doing some riding with my Raptor 700, i found out that it burns some oil.
I was running for about 1.5 hours without any stops. Came home and found that it
had consumed 9 litres of fuel, and 0.3 litres of oil.

Could it be that the oil gets to thin for that kind of riding? (Street riding at about 55 mph average speed).
I was using a 10W40 fully syntethic oil. Should i go with a 15W40/ or 20W40 ?

The thing is I have not noticed any oil consumption earlier this season. Only after this long ride.

I also did a compression check today, which turned out good. (Just as the manual states.)

Do you have any suggestions?

 

[yamaha1973]

i dont know if its related but i would use the 20-50 oil in the summer...

 

[Dimebag]

Why is that?

Would you care to explain?

Thanks

 

[pro116]

Dimebag.the ony true way to see if your oil rings are bad or a head gasket is to do a leak down test.I had a bad head gasket and oil was getting into the antifreeze and the compression was perfect.

 

[Dimebag]

I see.

There is no oil in the antifreeze. Neither is there any antifreeze in the oil.
Could it be the valve seals leaking on me? Or am i using to thin of a oil?

Do you mean there could still be damaged rings/piston even if the compression is spot on?

 

[pro116]

I don't think the oil is too thin too burn.

Yes you can have a bad oil ring and good compression.The upper ring is the compression ring.
It could be the valves too.

 

[Dimebag]

Ok,

So basically the compression test had no point for my problem.
It only shows that the compression ring is okay?

If I do a leakdown test, and the oil ring is damaged - i should get air coming from the crank case oil filler cap?

What about the valve seals? I have heard about problems with leaking valve seals on raptors before..
Air coming out air intake, or out exhaust muffler?

Ive never done a compression / leak down test before.. so there might be some stupid questions coming up..

Thanks

 

[fxnytroxtx]

I ran yamalube 15w50 in 450R didn't take a single drop and gear shifting was a lot smoother just my 2cents.

 

[yamaha1973]

Why is that?

Would you care to explain?

Thanks

Just a heavier weight for the summer heat, im sure there is going to be people that will disagree but thats just my opinion...

 

[Dimebag]

I ran yamalube 15w50 in 450R didn't take a single drop and gear shifting was a lot smoother just my 2cents.

Did you ever try running a thinner oil? Did you see any oil consumption with a thinner oil?

 

[fxnytroxtx]

I ran yamalube 15w50 in 450R didn't take a single drop and gear shifting was a lot smoother just my 2cents.

Did you ever try running a thinner oil? Did you see any oil consumption with a thinner oil?

Before 10 hour service I ran it with what ever oil that yamaha put in it, and efter that I switched to 15w50 and right away I noticed smooth gear shifting, and I didn't baby it ether and never took oil.

 

[cannondale27]

How does your airbox and filter look?Maybe the breather system ran some into airbox.

 

[Dimebag]

Airbox and filter looks good.

I was out riding for an hour today, with the 15W40 in it. No missing oil so far.

Ill keep watching the oil level carefully.

 

[thor452]

that is how it started on my rincon next thing you knew it was a quart of oil to a gal of gas. motor had to be bored out and new piston and rings installed no eason ever came up with it had work done by a reputable dealer and they didnt have a cause but has been good ever since. keep an eye on it mine started leaving a trail of blue smoke. hopefully it just got good and hot and it wont happen again. I would be sure to check oil level before any ride and periodiocaly during a long day.

 

[pro116]

The thicker oil will help but it shouldnt be using oil with the 10w40