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View Poll Results: What "viscosity" oil do you use in your Skyline
0w-40 40 3.57%
5w-40 156 13.94%
10w-40 186 16.62%
10w-50 175 15.64%
10w-60 212 18.95%
15w-50 259 23.15%
None of the above 91 8.13%
Voters: 1119. You may not vote on this poll

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Old 14th January 2008, 07:35 PM   #241 (permalink)
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Originally Posted by oilman View Post
Hhhmm, interesting... No reason I can think of at the moment for it.

Thinking cap is on though.

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Yeah, filler cap on and engine running great.
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Old 22nd January 2008, 09:51 AM   #242 (permalink)
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Did my oil change this morning to find that the oil pressure is higher than before with the thinner oil.
I used to use Silkolene pro R 15-50. when the oil was up to temperature it would idle at just above 2 bar. Now with the Silkolene pro S 10-50 it idles at 3 bar pressure when hot.
Would this be right ????
Was it 2 bar when the 15W-50 oil was NEW - or just before the change? Oil dilution will cause a reduction in viscosity and 'range' over time, and can be a good indicator of when an oil change is due. This means that over time / a few thousand miles your 15W-50 might end up being a 10W-40 - with a corresponding drop in pressure for the same flow.
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Old 22nd January 2008, 01:09 PM   #243 (permalink)
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Yep, could be fuel dilution.
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Old 5th February 2008, 07:24 PM   #244 (permalink)
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First I was using fully synthetic ELF 0W40, but now I am using MOTUL 300V Competition 10W50. It really makes a difference (much better!!).
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Old 5th February 2008, 07:54 PM   #245 (permalink)
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First I was using fully synthetic ELF 0W40, but now I am using MOTUL 300V Competition 10W50. It really makes a difference (much better!!).
I think you'll find it's 300V Competition 15w-50

Decent oil

Cheers
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Old 6th February 2008, 10:30 AM   #246 (permalink)
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I think you'll find it's 300V Competition 15w-50

Decent oil

Cheers
Simon
Sorry Simon! My wrong... You are totally right, it is 15W50>
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Old 6th February 2008, 02:37 PM   #247 (permalink)
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Question

I was using Motul 15-50 but cant seem to find it in south germany where I am for now , any ideas on the best source over here or a good alternative that is available locally ?

Thanks

Marcus
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Old 12th February 2008, 05:20 AM   #248 (permalink)
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Nissan recomend a 7.5w 30 oil for a standard BNR32. So I wouldn't go too far away from this. This is how I think of it. The thiner the oil, the easyer it is feed through your engine and the more oil you should have on your engine internals. The oil in your engine has to travel through little holes. Say you had a cup filled with oil. The cup has a hole in the bottom, the thiner the oil the more oil that will get through the hole. So I always try to stay close to what nissan recomend. That is how they designed the engine and they should know, as they have tested what was best. The next thing is different brand give different levels of protection for the same grade oil. That one I can not help you out with. But don't buy cheep oil. Stick with something you trust. I like mobil, pentrite and motul. Hope that helps
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Old 12th February 2008, 06:02 AM   #249 (permalink)
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that's exactly the rationale behind me using 0W-20 oil. It's Motul 300V so it's damned pricey stuff. I don't run on the track and I've got an oil cooler so I've never been able to realy cook my oil up to 90~100 degrees. During summer though I'll move to a 40 weight oil - but I'm going to experiment with placing an electric fan on my oil radiator, and add some inlet and outlet ducting and see how long into the spring I can run the thin stuff.
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Old 12th February 2008, 08:25 AM   #250 (permalink)
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I was told (so it's not me and I'm not to be quoted on this but) that your oil should be the same temp as your water 90deg. I was told this by someone who set up race cars as well as street cars.
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Old 12th February 2008, 12:02 PM   #251 (permalink)
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I've gotten 90 degrees oil temp during the summer, but I don't think I've ever gotten my water that hot, except with the A/C on and not moving in an August traffic jam....and I have a stock radiator!
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Old 12th February 2008, 04:13 PM   #252 (permalink)
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Originally Posted by mwebster View Post
I was using Motul 15-50 but cant seem to find it in south germany where I am for now , any ideas on the best source over here or a good alternative that is available locally ?

Thanks

Marcus
Try us

Opie Oils - Performance and Heating Oils discounts for GTR Members as well
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Old 12th February 2008, 04:16 PM   #253 (permalink)
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These cars in unmodified form on the road should run happily on a 5w-30 or 5w-40 however there are many that need something a bit more beefy due to modifications and or use/abuse!

You know that you can always contact us for the best advice

Cheers
Simon
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Old 24th April 2008, 11:46 PM   #254 (permalink)
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Originally Posted by oilman View Post
These cars in unmodified form on the road should run happily on a 5w-30 or 5w-40 however there are many that need something a bit more beefy due to modifications and or use/abuse!

You know that you can always contact us for the best advice

Cheers
Simon
PM me about your prices including shipping to Finland?
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Old 25th April 2008, 04:01 PM   #255 (permalink)
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How much are you looking at?

Cheers

Guy.
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Old 27th April 2008, 05:53 PM   #256 (permalink)
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15w50 mobil 1 motor sport for me
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Old 27th April 2008, 06:31 PM   #257 (permalink)
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This poll has run a while now and although I find the numbers of people running sae 40's and 50's encouraging I also find the number of people running 10w-60 somewhat disturbing.

I would give the following advice to those using 10w-60 (it's up to you whether you take it).

If your oil temps are below 100degC consider changing it as it is very thick at these temps which could lead to long term problems. Up to 120degC you are better off with a 5w-40, 10w-40, 10w-50 or 15w-50.

Take a look at these figures, over 30cst at high RPM can cause problems added to which your BHP figures will be down and your fuel consumption up as your engine wastes power trying to circulate thick oil.

Grade..................0degC.......10degC.......40 degC...............100degC


5w-30..................654............338...........7 4.......................12cst

5w-40..................874............440...........9 1.......................14cst

10w-40................892.............450..........99. ......................14cst

10w-50...............1034............537..........116. .....................18cst

15w-50...............1535............735..........135. .....................18cst

10w-60...............1553............795..........165. .....................24cst

Just my view on this poll, all forums should have one

Cheers
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Old 7th July 2008, 02:57 AM   #258 (permalink)
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seeing the bearing damage done with 0W-20 oil, I'm now concerned about oil film strength. Of course, the main problem was bad bearing clearances but now I'm thinking that cooking my oil too much reduces the film strength and may allow crank to bearing contact. Am I barking up the wrong tree? I have a pretty efficient cooling system I think, and I don't run for sustained periods, so I have never in my life seen oil go over 110 degrees.

Considering centistokes and oil flow, I'd run nothing heavier than Castrol 0W-40, as my oil temps never get that high. But because of my concern for film strength, I am now thinking that 10W-60 is what I should use.

Advice definitely wanted!
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Old 7th July 2008, 12:56 PM   #259 (permalink)
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Dont bother with 10w-60, the SAE60 is just too thick.

Film strength will depend on the quality of the oil being used, more so then the viscosity.

Cheers

Guy.
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Old 7th July 2008, 03:41 PM   #260 (permalink)
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Castrol Edge 0W-40 - quality stuff?
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