1993 BMW 325is OIL CHANGE FROM SYNTHETIC TO REGULAR?

Tiny
SYSTEMONE
  • MEMBER
  • 1993 BMW 325
I have a 1993 BMW 325is with 130k miles on it and I took it into a shop to have some work done on it and I noticed after looking over the reciept that they changed my oil and put regular non-synthetic 15-40 oil in it and ive always run full synthetic oil in it ever since I bought the car back when it only had 40k miles on it
Is that ok to change from synthetic to regular oil like that after running full synthetic for almost 100k miles?
should I be worried?
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Wednesday, May 23rd, 2007 AT 10:33 AM

3 Replies

Tiny
JACK42
  • MEMBER
Take it back and have the synthetic put in it. Wont hurt anything, but if you have always run it, have it changed back
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Saturday, May 26th, 2007 AT 8:36 AM
Tiny
SYSTEMONE
  • MEMBER
I went back to the shop and requested them to change the oil back to synthetic but they said no they wouldn t do it and that I shouldn t have put synthetic oil in the motor to begin with and that it causes problems and they also said that it looked like I would need a new head gasket within six months but they did not tell me this when I first brought the car in for them to do the valve cover gasket that was leaking a small amount of oil (the oil change was done when they replaced the valve cover gasket)
also I was wondering. Why would they do the valve cover gasket if they noticed the head gasket needing to be replaced. And I was wondering if it was even possible to predict a blown head gasket before it actually happens.
The car ran great before I took it to them for a sudden starting problem that they also say was a faulty battery (and I know the battery was fine since it was an interstate red top sealed battery that wasn t very old)
the whole thing is a rather long story so ill cut it short and get to my main question witch is. Is there anything they could of done wrong to the car to cause the head gasket to blow? And was it right for them to go through with the valve cover gasket if they knew the head gasket was about to blow and they would pretty much have to rebuild the motor anyway.
I think they took advantage of the situation and it just doesn t seem like everything was done honestly.

Any opinions or advice would be appreciated

i can email a more detailed description of the whole story which is way to much to list here if neccessary
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Monday, May 28th, 2007 AT 4:47 AM
Tiny
JACK42
  • MEMBER
Im not sure how they can predict a blown head gasket unless it is an inherent problem with the car. When a vehicle is leaking oil it is usually best to start with the highest leak, makes it easier to find others if there are any, not to mention if the v/c gasket was leaking it was probably leaking onto the exhaust causing smoke and potential fire hazard depending on how bad the leak was.I do think it is odd they dont recommend synthetic oil, it is much better than regular oil, and doesnt cause any problems as long as the engine is broke in before it is used
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Monday, May 28th, 2007 AT 7:53 AM

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