 which oil grade 20W50 or 15W40 |
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 Jun 14 2004, 08:26 PM
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#1
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2nd Gear Group: Members Posts: 2 Joined: 14-June 04 Member No.: 37,253  |
Hi all,
So far i am using 20W50 oil grade, and now looking into less "friction" by using 15W40 so will reduce some "pressure" on the engine at high RPM with normal running temp, probably will prolong life of oil seals, reduce engine stress etc. Of course, it's still mineral based either way. Does this make sense with what i am trying to achieve, or it's the other way round? rahman |
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Jun 15 2004, 09:28 AM
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#2
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Fast & Furious  Group: Members Posts: 1,276 Joined: 21-October 03 Member No.: 30,811 |
friction...with higher viscosity...less friction...
but too high viscosity...make you engine work harder...so...i think you mean this "friction"... But generally ...higher viscosity for longer life of the engine...and lower viscosity for higher fuel economy... |
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Jun 15 2004, 11:16 AM
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#3
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2nd Gear Group: Members Posts: 2 Joined: 14-June 04 Member No.: 37,253 |
boss,
so do you know 15W40 viscosity compared to 20W50? Is it too much difference that i should use 20W50 for longer life, would 15W40 give balance of fuel economy/longer life. rahman |
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Jun 15 2004, 11:24 AM
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#4
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Veteran Group: Members Posts: 220 Joined: 28-May 04 Member No.: 36,803 |
if your car is not too old or noisy . . . use 15w/40. If u can afford use
semi syn. |
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Jun 16 2004, 01:25 PM
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#5
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Fast & Furious Group: Members Posts: 1,276 Joined: 21-October 03 Member No.: 30,811 |
both are okay...
go ahead and change to 15W40...but dont expect big saving on fuel economy...more like 2-3%...or 5% max... |
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Jun 16 2004, 10:29 PM
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#6
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 N20 Soul Group: Members Posts: 28,026 Joined: 23-February 04 From: What do you think? Member No.: 34,274 |
ive been using 20-50 multigrade since new car for abt 3yrs n just recently
changed to 15-50 semi-syn. n honestly no diff. at all. |
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Jun 17 2004, 08:58 AM
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#7
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Fast & Furious Group: Members Posts: 1,276 Joined: 21-October 03 Member No.: 30,811 |
but note that he is changing to 15W40...40 indicates viscosity at
operating temperature...which is lower than 50...lower viscosity means less force required for the engine part to move...which should result in better FC...at least on paper it should... |
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Jun 17 2004, 01:27 PM
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#8
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Taxi Driver Group: Members Posts: 345 Joined: 20-May 02 Member No.: 20,479 |
But if you engage in traffic jam under extremely hot afternoon, protection
to the engine is less if using 15W40 compare with 20W50 |
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Jun 18 2004, 09:28 PM
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#9
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Fast & Furious Group: Members Posts: 1,318 Joined: 18-September 03 Member No.: 30,037 |
for a 1.3 car, you can feel the difference between 20/50 and 15/40
viscocity, the load is lighter for the engine when revved hard, according to my experience |
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Jun 19 2004, 09:58 AM
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#10
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Driver Group: Members Posts: 37 Joined: 1-June 04 Member No.: 36,893 |
base on all sifu experience, for wira 1.3, which spec is good?
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