Y33 possible oil change problem

[RAQ45t]

My '97 Q45t has always had dealer-serviced oil changes for its 162k life. Today,while having other work done at an indepentant shop,they put in 10-30 pure synthetic oil,rather then the Castrol blended 5-30 the dealer here uses. In the past(with BMWs),any car with high mileage changed from mineral based to synthetic oil had a good chance of delevoping engine seal leaks from the thinner,more efficient(at cleaning) oil. Will the change from blended to pure synthetic possibly lead to seal leaks in the Q,or am I just too paranoid?

[NightRiderQ45]

My '97 Q45t has always had dealer-serviced oil changes for its 162k life. Today,while having other work done at an indepentant shop,they put in 10-30 pure synthetic oil,rather then the Castrol blended 5-30 the dealer here uses. In the past(with BMWs),any car with high mileage changed from mineral based to synthetic oil had a good chance of delevoping engine seal leaks from the thinner,more efficient(at cleaning) oil. Will the change from blended to pure synthetic possibly lead to seal leaks in the Q,or am I just too paranoid?

I think this is a case by case situation. The full synthetic will clean out the crud in the engine and oil will probably seep thru the old VC/seal gaskets. That's what happened to my car. My vc never leaked until I put full synthetic oil in my car. I went back to dino oil, but they are still leaking. I fixed the vc on the passenger side, just haven't done the driver's side yet. Once you start to smell oil hitting the hot exaust, then you will know for sure.

[maxnix]

I think you are fine, and no worry about leaks.

I really thought the M1 5W-30 was not right for the VH, and run 10W-30 M1 predominantly.

[NightRiderQ45]

I think you are fine, and no worry about leaks.

I really thought the M1 5W-30 was not right for the VH, and run 10W-30 M1 predominantly.

Why do you say that? I'm running 5w 30 dino now.

[maxnix]

Just seemd a little thin even in Seattle winters. It seems to be a different formulation thatn the 10W-30.

I always ran at least 5 qts. of 10W-30 with it.

[RAQ45t]

Thanks for the help;seems they're going from the 5-30 Castrol blended to pure synthetic won't require me to promptly remove it to prevent leakage..

[maxnix]

Leakage should not be a problem. High temperatures in summer operation might be.

[RAQ45t]

High temperatures? No problem here I hope. Hits about 80 degrees here S.Fla.in the winter

[maxnix]

Not winter, summer.

[RAQ45t]

Thanks again for your help..the last was kind of an LOL statement.

After 10 years down here,anything less than 60 degrees seems downright cold.

[maxnix]

Yeah, I see parkas, gloves and scaves on the panhandlers when its 70 here. Total crack up.