more tha 10K miles, too late to switch to Synthetic?

I have heard that in cars you don't want to switch to synthetic oil if it has more than 50k or so. Is the same true for bikes? Is it always better to use synthetic?

you should be fine. unless you have any leaks. they will just get worse!!

you should be fine. unless you have any leaks. they will just get worse!!

yeah, I don't have any leaks but I am burning some, so I guess I will stick with conven

in my opinion, if you want to use synthetic, start using after maybe 2k miles.

in my opinion, if you want to use synthetic, start using after maybe 2k miles.

Yeah, that's probably right, I made the switch in my car at about 20k and it has been fine

I switched at about 4k mi and its been fine. I started on it because I didn't like the way it shifted and the synthetic helped that.

Change to it if you dont mind the extra $$$ with no leaks it wont hurt at all. My L has just gone over 10k and im gonna switch prolly next change I dont mind paying $6 extra for the 3 quarts oil at a oil change.

this is why people say that switching to synthetic will cause leaks:

Synthetic has better suspension properties than dinosaur juice. over time the gaskets in your engine will be covered with a fine layer of sludge, if your gasket is bad, this sludge will keep oil from coming through and leaking outside. When you put synthetic oil into a higher mileage dino oil engine, a couple things happen:

1. the sludge becomes suspended in the oil and is actually cleared as you change the oil over time, any sludge that is covering bad gasket material will start to leak.

2. Your piston rings will reseat once you start using synthetic and you will start to burn some oil at first.

agree with #1, never heard #2.

Yep, I'm very sure that using synthethic oil will stop any breaking-in of engine parts. It's primarily why synthetics are not recommended during the break-in period. If your gaskets are sound, switching to a synthetic oil at 20k is fine.

correct!:thumbsup:

hell, I don't even know how many miles my XR has on it. It's a '92 and the add-on odo shows about 9k, so there is no telling. I guess I will stick with the conven oil, no leaks now and I would like it to stay that way.

One thing I would add is that with my car(a 2004 Subaru STi) switching to full synthetic actually reduced oil consumption, my guess is that synthetic has a higher tolerence for heat and friction and therefore doesn't burn off as easily. If you are familar with that car you may know that it will use oil by design. That being said, this is a motorcycle forum and comparing the XR/XL engine to a turbocharged high output boxer 4cyl engine probably has no place here just thought I would throw it out there.....but I do think it is worth it if the extra money isn't a big deal and the bike/car has fairly low miles.

Corvettes come from the factory with Synthetic oil.

I have heard that in cars you don't want to switch to synthetic oil if it has more than 50k or so. Is the same true for bikes?

Sounds like an urban myth to me...

Is it always better to use synthetic?

Synth oil (non-EC) is a good choice for air-cooled motors. Been runnin' 15W-50 here in the desert southwest for years in my used '98 XRL with no issues. Does seem to shift more smoothly with full synth compared to dino oils, though I don't have any scientific proof...

Keep Ridin'

D_D

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