which oil grade 20W50 or 15W40
Posted 14 June 2004 - 08:26 PM
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
Posted 15 June 2004 - 09:28 AM
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...
Posted 15 June 2004 - 11:16 AM
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.
Posted 15 June 2004 - 11:24 AM
Posted 16 June 2004 - 01:25 PM
go ahead and change to 15W40...but dont expect big saving on fuel
economy...more like 2-3%...or 5% max...
Posted 16 June 2004 - 10:29 PM
changed to 15-50 semi-syn. n honestly no diff. at all.
Posted 17 June 2004 - 08:58 AM
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...
Posted 17 June 2004 - 01:27 PM
to the engine is less if using 15W40 compare with 20W50
Posted 18 June 2004 - 09:28 PM
viscocity, the load is lighter for the engine when revved hard, according
to my experience
Posted 19 June 2004 - 09:58 AM