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BMW Repair/1999 323i oil changes
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Question
I just bought a 1999 323i, and I want to change the oil. The car was run with synthetic for the first 80k miles, but the third owner did not use synthetic for the last 10k miles. Should I switch back to synthetic? Also, do you recommend I keep using 91 octane, or does 87 octane suffice?
Thanks,
Ryan
I have been under the assumption that once you use synthetic oil you should stay with it.But I am more of an old school type of guy and use a good quality oil such as Castrol.I have not used the synthetic but do change the oil at 3000 mile intervals.Checking the owners manual would give you the exact fuel octane to use.But I think that 87 works well and its 20 cents or more cheaper
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Don Berlan
Expertise
ASE Master Mechanic for 25 years. Can help with all aspects of BMW repair. I especially enjoy driveablity problems, mechanical or electrical.
Experience
I have been an ASE Master Mechanic for 25 years.I have worked in many dealearships although BMW's are my favorite.I now have my own shop,specializing in BMW's.I have autocrossed and even gotten into mud running with my 4x4.(I am NOT a teacher and don't claim to know everything about the cars I never see.I hope to help you with your repairs and do expect some knowledge on your side.)
Education/Credentials
CMVTI, Auburn Maine
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