My friend use before in Honda CT. Seems it won't evaporate (disappear) if revs kept below 3to 4k rpm.
Highway runs then seems to consume some oil.
Another friend in his kelisa use 5w-30 2L mixed with 5w-20 1L......

5w-20 oil??

Oh! like my friend.....

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Added on October 19, 2011, 8:29 pmSame brand of oil.....

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Added on October 19, 2011, 8:32 pmToo thin or no volume, but I think 5w-20 still have the volume, but not sure can stand how hot?

This post has been edited by vr2turbo: Oct 19 2011, 08:32 PM

What car? For my old car actually I do mix. Some time needs some top up, so see what is available....

If high pressure means block also......

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Added on October 21, 2011, 8:22 pmTo me is Yes. No chemical reaction and have use many times like that, even FS mix with SS oil.....hahahhaha

This post has been edited by vr2turbo: Oct 21 2011, 08:22 PM

If oil pressure becomes too high, oil channels may be blocked......

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Added on October 21, 2011, 9:01 pmHave been using for years, especially when change brands, and viscosity. Then get balance here and there, so mix and use loh...

This post has been edited by vr2turbo: Oct 23 2011, 02:24 PM

Best is still to follow car manufacturer recommendation in car manual...
If modify a bit may be okay but not too much.

Not sure, but racing oil do not have additives for prolong use or something....my 2 sens....

They only want the oil for lubrication and one race only, then change already.....

Changing at 5k km??

Through the years of using engine oil, I now prefer to use cheaper oil and change more often because you will take away all the dirt, soot etc., and the engine gets new oil.......
Oh! that is for my turbo that is. Runs very hot. I use to do 10k km or 6 months on FS, but not shorten to 3 months only.


This post has been edited by vr2turbo: Dec 4 2011, 09:49 AM

Yup, exactly. I want to remove the dirt if not sludge since still early. If kept longer may just turn to sludge....
I am using even cheaper then that at RM22 per L. Just got some at warehouse sales at RM70 per 4L....

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Added on December 4, 2011, 8:51 pmthe w denotes winter, therefore 0w is even lighter then 5w, but both are not use in Malaysia weather as we never have winter here, therefore even if you have 10w-20, not much difference....

This post has been edited by vr2turbo: Dec 4 2011, 08:51 PM

Firstly, what is the recommended viscosity written in your car manual. Should follow that.
Other that that, basically if you want to follow the chart by oil manufacturer, they recommend by ambient temperature and from what I see they will recommend at least 30 weight oil for our weather.
But oil technology have come a long way and I do see a few distributor bring in 20 weight oil nowadays, therefore I am not too sure who to follow. Therefore, I still stick to my car manufacturer recommendation.
My take, is 30 weight for smaller engines and 40 weight for larger capacity, 50 weight for hot running and/or worn engines. I had a friend on a kenari and he mixed 5w-20 with 5w-30........maybe he dare not use 20 so get 25.....

This post has been edited by vr2turbo: Dec 5 2011, 07:47 AM

Fuyoh! Torco is not cheap woh........

20 ans 30 weight difference is only the viscosity thickness, cost of making don't know...

Could the 0w-20 be meant for colder Japan Climate?
I tried using 5w-30 for my turbo, but once heated up, the engine became very noisy, so had to switch back to usual 5w-40....

I took it out after a week. Cannot stand the noise. Even for 5w-40 some amount will vaporize, so 30 will be worst....but I do take it up to high revs.

My friend who tried 5w-20 of course in newer NA car, did have some oil consumed if he takes it up to high revs. If drive normal it is okay, but I think he change back to 30 already.....

LMST is recommended to use 10w-40 if not mistaken.....

10w-30 for LMST is okay, but if go to track better use at least SS 10w-40.....

To me oil don't evaporate. Oil consumption is due more to the car and driving style.
Lighter viscosity is said to slip through worn pistons and rings and get burnt off.
I do drive fast and using lighter viscosity oil in my worn engine, I have to add more in, between my OCI.....