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Imported from Z31Performance.com Forums{{#if:perna00| — original post by perna00}}{{#if:2010-07-19 11:17:05|, posted 2010-07-19 11:17:05}}{{#if:2| · 2 post{{#ifeq:2|1||s}}}}{{#if:/Z31performance_archive/forum/z31-basics/basic-modifications-basic-questions-aka-the-newbie-forum/11320-oil-change-what-a-difference.html|
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perna00: (2010-07-19 11:17:05)

Normally I change the oil in my vehicles around 3k miles. Most past vehicles I'd notice slightly better gas millage, sometime a little bit smoother running engine. I just bought my Z, changed the oil before I started it up the first time. Ran good. It's been about 2,000 miles and the oil was looking very black for the miles so I decided to change it again. I changed it and test drove it; it make a pretty big difference driving it as far as power is concerned. I actually felt like a 5hp difference. Maybe the person before me didn't take care of it and it had quite a bit of buildup I removed? Maybe the design of the Z's engine just causes this condition? Anyone have any input of the subject?

blackhawk60m: (2010-07-21 05:44:47)

I get the same feeling, and i think its just a placebo effect. Oil might make it run smoother, but its not making it much faster at all.

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