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InsaneBimmer
09-09-2007, 04:17 PM
Ive had my E30 for about 4 months now (albeit I think its greater than sliced bread) and Ive never had an owners manual to keep track of maintenance intervals. Just to be on the safe side I've always run 93 octane, always used Mobil1 Full Synthetic, and just for kicks its always an oil change at 3000 miles or before.

So my question is what are our milestone maintenance intervals? i.e. oil changes, type of oil, and intervals, and minimum octane?


BMW

sproule905
09-12-2007, 12:58 PM
i've got a manual for it you want it.... $25 and its yours

InsaneBimmer
09-12-2007, 03:07 PM
Thanks but I can buy a new one for cheaper than that ;-)

Mystikal
09-12-2007, 08:36 PM
87 octane is perfect for a non-chipped car, 3000mi/5000km oil change intervals, 20W-50 non-synthetic for milder weather and 10W-40 non-synthetic for cold weather.

Jay

InsaneBimmer
09-13-2007, 09:40 AM
Im running a 10W-30 Full Synthetic at the moment. Figure'd Id go a bit above the cut. I guess Im just running 93 for shits and giggles then :-P. I am planning to chip it but not sure if there is a point with an M20B27.

Mystikal
09-13-2007, 05:45 PM
10W-30 is horrible for an M20. Switch that ASAP. Synthetic is also not a good choice.

Chips do by far the most for an eta. Think 20+hp.

Jay

InsaneBimmer
09-13-2007, 05:48 PM
I dont see where 10W/30 is a bad idea or the fact of synthetics...

If you can show me undeniably something I can take to my mechanic I'll make them go change it but I spent $60 in full synthetic so Im not paying another 60 unless I can see an unforseeable danger. No offense of course. As a matter of fact before its first oil change in my ownership it had considerable valve noise and with this oil its noticeably quieter. So where did I go wrong?

20hp? Is that worth the cost of the chip itself?

Mystikal
09-13-2007, 06:03 PM
I dont see where 10W/30 is a bad idea
You need the manual.

or the fact of synthetics...

If you can show me undeniably something I can take to my mechanic I'll make them go change it but I spent $60 in full synthetic so Im not paying another 60 unless I can see an unforseeable danger. No offense of course. As a matter of fact before its first oil change in my ownership it had considerable valve noise and with this oil its noticeably quieter. So where did I go wrong?
Years of working with E30s and speaking with very knowledgable engine builders? I've been around these cars since 1990 and learning from the tuners since 1998, but you're free to disagree. Your positive experience is only a sign that the previous oil was even less appropriate for the motor.

You're also doing $60 oil changes on an engine that people can't give away for free. Think about that one.

20hp? Is that worth the cost of the chip itself?
I think you'd have to field that one yourself.

Jay

InsaneBimmer
09-13-2007, 07:44 PM
Well I just got back from visiting a dealer and they said 10W-30 is on the spectrum of appropriate oils for the M20B27. 10W-30 and 15W40 is fine. They also said full synthetic is fine as well. I find it hard to go against what they say. They work on them everyday...

Mystikal
09-13-2007, 11:07 PM
$20 says 95% of the employees there weren't around when E30s were actually in there in large numbers. Even the BMW literature states 20W-50 for anything above freezing temps.

But, do as you please.

Jay

Axxe
09-13-2007, 11:19 PM
10w30 is just too thin for M20's. They are a prehistoric motor with huge oil passages and high tolerances on seals, rings, etc. And they run VERY hot. Try touching the intake manifold or the valve cover after it idles for 5 mins; low viscosity oil doesn't stand a chance in that hell.

FuryriderX
09-13-2007, 11:21 PM
As a matter of fact before its first oil change in my ownership it had considerable valve noise and with this oil its noticeably quieter.

Either that, or the oil is masking the fact that the valves are badly out of adjustment? *wiggle*

InsaneBimmer
09-14-2007, 11:11 AM
Either that, or the oil is masking the fact that the valves are badly out of adjustment?

New head, cam, valves, retainers, and springs went on in November. I find it hard to believe they'd be out of whack already.

xpress325
04-07-2011, 02:38 PM
RESURRECTING AN OLD POST

If i am running synthetic can i drain it well and run conventional?

InfiniteDice
04-07-2011, 02:59 PM
IMHO

I use 5w50 synthetic in the winter 20/50 in the summer. The cold start up and cold pour protection for extreme cold weather is my primary concern (I'm talking -40 to -50c). Secondly if the car were to 1) break a pan and you lose oil, or 2) lose the coolant and it overheats you are safer with the higher protection offered by synthetics.

The biggest fear over synthetic is that the oil will cause leaks, well if you need sludge in the engine to block gasket leaks... maybe you need to change some seals and gaskets.

For extreme over heat and cold starts use synthetic.

Whatever oil you use when the car is at operating temperature it shouldn't thin past a 50 weight.

xpress325
04-08-2011, 11:54 AM
understood. Thanks