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View Full Version : what oil do u guys use??


BmW1819
08-18-2011, 08:22 PM
i was wondering what oil you guys use in your m20's

desmo
08-18-2011, 08:47 PM
Good question! I was just reading a great thread about this on E30tech.

I've been using BMW synthetic 5w30 because Mike at Maranello's gets us a great price. But there are so many opinions and options....The most interesting one i've heard is using Diesel oil (forget the brand) becaues it "does wonders to lower noise M20 valvetrains"

InfiniteDice
08-18-2011, 09:01 PM
I use synthetic 5w50 in the winter, 20w50 in the summer.

I wouldn't personally go below a 40 weight. You can get 5w40 and 10w40.

If you ask me for a recommendation it will be 5w50 synthetic especially if you run the car in the winter. Most engine damage occurs when the engine is starved for oil during a cold start or when the engine overheats. The synthetic is what you want in those cases. Higher flash point, boil point, and pumps way better at very cold temperatures than regular oils. I still recommend changing the oil at or before 5000km even if it says it lasts longer, but that's just my preference.

BmW1819
08-18-2011, 10:33 PM
where do u get the 20w50??

Bullet Ride
08-18-2011, 10:48 PM
where do u get the 20w50??

Canadian Tire sells the jugs of Castrol Syntec 20W50

craz azn
08-18-2011, 11:03 PM
I just used regular 20w50 in the e30 with a can of Molyslip everytime. Worked well for me!

BmW1819
08-18-2011, 11:09 PM
yea always can of mos2 Molyslip :) what 20w50 do u use??

craz azn
08-18-2011, 11:29 PM
regular Castrol

everlast
08-19-2011, 10:08 AM
I use Mobil 1 15w50 synthetic, since I drive less than 3000 kms a year on this car it allows me to keep the oil in it over the winter instead of having to change it in the fall and put 0 kms on it and change it again. I have an oil pressure gauge and I wait until the oil "gets moving" before being hard on the loud pedal.

El Gato Liso
08-19-2011, 10:32 AM
my old m20 always got mud (actually, 20w50). now my m50 gets 20w50 too.. mainly for the hot months. and i never did oil changes........i just kept topping up *whistles away....*

propr'one
08-19-2011, 11:31 AM
i ran 20w50 in my e30 too. ran awesome.

NOTORIOUS VR
08-19-2011, 01:49 PM
50 weight is a little excessive IMO for an M20, especially 20W-50...

a good 5W-40 is fine...

Take a look @ Rotella T6... it's cheap and very good oil.

bart325is
08-22-2011, 01:08 PM
20 dubya fitty dinoco all year round. Like the manual says.

dble Trouble
08-23-2011, 11:49 PM
What ever is on sale that is 20w50, I don't believe the whole synthetic argument. As proof, my car that is beat on has 350,000 of good ol' regular oil. I put 60,000km/ year on the car since I've had it which is two years now, previous owner told me he just put regular oil as well.

nonlocal
08-24-2011, 05:29 PM
As an added bonus whenever you get an oil leak it will eventually scab over.. nyuk.

InfiniteDice
08-25-2011, 05:52 PM
When you get to extreme examples you'll see that synthetic is always better.

Try vehicles in Antarctica or lubricants in the space program. They use synthetic for a reason. Does everyone need to use them? No. If you want your engine to last a long time, and you drive it all winter, I suggest you use 5w50 synthetic. Try pouring 5w50Syn and 5w30dino at the same time, at -45c. Imagine the oil pump trying to pump it...

noodles101
08-25-2011, 06:08 PM
lubromoly 5w40

dble Trouble
08-25-2011, 11:53 PM
When you get to extreme examples you'll see that synthetic is always better.

Try vehicles in Antarctica or lubricants in the space program. They use synthetic for a reason. Does everyone need to use them? No. If you want your engine to last a long time, and you drive it all winter, I suggest you use 5w50 synthetic. Try pouring 5w50Syn and 5w30dino at the same time, at -45c. Imagine the oil pump trying to pump it...

If an engine gets beaten on for 350,000km and still has full compression using only mineral oil it's entire life, why would I or anyone need synthetic? Especially with the extra cost associated with it, and the fact that living and driving in TO. is not considered an extreme example??? Face it, people just use it because they got sold on it!

BmW1819
08-30-2011, 09:18 PM
agreed :)

If an engine gets beaten on for 350,000km and still has full compression using only mineral oil it's entire life, why would I or anyone need synthetic? Especially with the extra cost associated with it, and the fact that living and driving in TO. is not considered an extreme example??? Face it, people just use it because they got sold on it!

Robb
08-30-2011, 10:01 PM
Well, I just did my oil change today on the CRX using the OE Amsoil 5w30.
For a case of 12, I paid $57.60 + HST which is $4.80 a quart ! I ordered it through my dealership. Canadian tire charges $14.99 a quart for the same thing !

Basically I paid $4.80 a quart x 3.5 Litres used = $16.80 + $6.00 Napa Gold oil filter = $22.80 + HST

Most shops charge you $69.00 + HST for a synthetic oil change !!
If you need to make an order, use this place !

http://www.pascosynthetics.com/

Here's some info on it. It's a really cheaply priced Synthetic, perfect for daily driven cars that arent raced !


http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2051025

http://i51.tinypic.com/14abh4y.jpg
http://i1008.photobucket.com/albums/af202/CompSyn/DSC00841.jpg

NOTORIOUS VR
08-31-2011, 12:09 AM
If an engine gets beaten on for 350,000km and still has full compression using only mineral oil it's entire life, why would I or anyone need synthetic? Especially with the extra cost associated with it, and the fact that living and driving in TO. is not considered an extreme example??? Face it, people just use it because they got sold on it!

You do understand that going synthetic means your OCI's can be extended to offset the cost. Plus they have better detergents, don't break down as easily, flow better when cold, don't break down as easily when hot, etc, etc.

All positives and no negatives at all compared to dyno oil.

There really is no argument here, other then the fact that you are happy with dyno oil. But synthetic oil is better all around.

dble Trouble
09-04-2011, 02:02 AM
^^what are OCI's? and I strongly believe in if something isn't broken, then don't fix it. It supposedly flows better, OCI's can be extended better detergents doesn't break down as easily etc. etc. as you said. But what does this all mean if dyno oil lubricates my engine perfectly well and causes no damage, no unnecessary wear, is recommended by the manufacturer, costs less, then why would I or should I use much more expensive synthetic???

noodles101
09-04-2011, 02:21 AM
kinda off topic .. but is molyslip good for ur car? or bad for ur car in a long run?

my vdub friends keep telling me i shouldnt use it...

InfiniteDice
09-04-2011, 03:00 AM
You perhaps shouldn't need to use synthetic.

When I lived in northern Quebec the ambient temperature would be lower than -40c for about a week or two. I found that even with 5w30 with the block heater it was a bit hard to start on those days. Running the 5w50 I never had an issue starting even without the block heater.

This is one example I like to use as I still drive up there at least once every winter, and I like how I can have the nice low temp cold start flow, and have it not thin past a 50 weight when up to temp. No normal oil can do this.

Further to this point not all synthetics have similar properties, some are preferable to others in certain circumstances.

NOTORIOUS VR
09-11-2011, 01:47 PM
^^what are OCI's? and I strongly believe in if something isn't broken, then don't fix it. It supposedly flows better, OCI's can be extended better detergents doesn't break down as easily etc. etc. as you said. But what does this all mean if dyno oil lubricates my engine perfectly well and causes no damage, no unnecessary wear, is recommended by the manufacturer, costs less, then why would I or should I use much more expensive synthetic???

Listen I am not here to convert you to use synthetic. But regardless of what you choose to use or believe, synthetic oil is better then dyno in every way.

MisTAmaN
04-24-2012, 02:13 PM
i got my first oil change coming up soon on this current vehicle im driving with and got an amazing deal on 5w50 Qs syn oil.i currently have inside castrol gtx non-syn 10w30 and runs pretty decent. a little loud tick every now and then 2500-3500rpm range but does the job.

previous cars which were all m20's either had 5w30 castrol syntec or 5w30 castrol hi-mile plus lucas stabilizer. i didn't notice the difference of any unless hard driving at cold starts when im running late for work. in the hot/cold GTA weather it seems to keep up, maybe i don't know when the oil is breaking down.

my real questions besides using the Qs syn 5w50, does the decision of oil depend mostly on the degrees of weather or the driving habits of the driver?

now i know of synthetics out performing conventional oil, but from reading this and other forums people are using 15w40 5w40 20w50 5w50 0w40 0w30 as common oils to use, but
what ever happen to just 5w30 and 10w30? i thought these are the most common in overall protection and all vehicles, especially back in the the day.

mr ilia
04-25-2012, 12:05 AM
M42 - 10w30, Castrol, mineral oil.
I've never used Synthetic in any of my cars. Never had a problem with that. My oil changes are done within 7500 to 10000km interval. 5000km oil changes is a pure marketing ploy..never believed it even for a second.

Sorry, my bad, I used synthetic in my e46, as it was recommended oil with oil changes every 20000km (?)....all other cars, Toyotas, Hondas, E30, Nissans and Chevys always got mineral oil and usually Castrol.

MaxBell
04-25-2012, 12:43 AM
M42 - 10w30, Castrol, mineral oil.
I've never used Synthetic in any of my cars. Never had a problem with that. My oil changes are done within 7500 to 10000km interval. 5000km oil changes is a pure marketing ploy..never believed it even for a second.

Sorry, my bad, I used synthetic in my e46, as it was recommended oil with oil changes every 20000km (?)....all other cars, Toyotas, Hondas, E30, Nissans and Chevys always got mineral oil and usually Castrol.

I read an academic journal recently on Google Scholar that was talking about exactly. California I know is urging people to wait on the oil changes for 7500-10000 kms. Maybe years ago when oils and engines were not as good at they are today, but with all the additives now, oil works very well and lasts a long time.

adam325i
04-25-2012, 01:54 AM
If you use regular oil and its super cold outside. Squirt little bit of gasoline to get the oil flowing.

I agree with Dble Trouble. Regular oil changes and if something breaks, fix it. My car has over 320,000 km. Seen 4 track days, bounces off the rev limiter all day long and still has good compression.

Synthetic has a purpose and a places, its great for some people, others its not needed.

20w50 is what i usually use.

L8 Apexr
04-25-2012, 02:14 PM
Stay away from redline synthetic for winter use,I ran it in my ice race car years ago untill I rolled the car one race and lost some oil.Pounded out the dents,reinstalled the lexan windsheild,grabbed the spare jug of redline and......what the hell I had to squeeze it out of the bottle.

That was at maybe -15 at the most,I won't use that crap again.

SamE30e
04-26-2012, 09:30 PM
50 weight is a little excessive IMO for an M20, especially 20W-50...

a good 5W-40 is fine...

Take a look @ Rotella T6... it's cheap and very good oil.

This...

Causing excessive wear...

Just use 5w30.

MAYBE 10w40

E36is
05-28-2012, 08:30 PM
on the weekend switched over to Rotella diesel oil (15w40) for the eta. First thing i noticed is that the valve chatter is gone, but i also notice that with the thick oil, going from 60 to 100km takes even more time! watching the tack needle rise is literally like watching grass grow!

aviator
09-04-2013, 08:20 PM
Well looking at pg 52 of the owners manual according to the chart the best oil for winter would seem to be 10w40 being rated for -30 to +15C and for then for summer a 20w50 being good for -10 to +50C.

And yes I'm in a mood to wake zombies today bwahahahahaha

BmW1819
09-06-2013, 10:13 PM
Am using m juice lubromoly