How many "CATERHAM BLEND" users?

[fpracha]

Originally Posted By: Capa
I have a 1999 Lexus GS400 and have tried 0W-30, 0W-40, and 0W-20 in that order. I got some free Toyota 0W-20 because of a mess up at the dealership and so I plan to try this Caterham blend in about two months (I do yearly OCI's).

Have you measured any fuel savings during this shift from 0w-40 to 0w-20 ? Is your GS400 short tripped or mostly driven on highway ?

 

[Capa]

Originally Posted By: fpracha
Originally Posted By: Capa
I have a 1999 Lexus GS400 and have tried 0W-30, 0W-40, and 0W-20 in that order. I got some free Toyota 0W-20 because of a mess up at the dealership and so I plan to try this Caterham blend in about two months (I do yearly OCI's).

Have you measured any fuel savings during this shift from 0w-40 to 0w-20 ? Is your GS400 short tripped or mostly driven on highway ?


When I went from 0W-30 to 0W-40 the 300hp V8 felt lethargic and there was some MPG loss. When I switched to 0W-20 the car felt very peppy but the MPG was about the same as the 0W-30. I would never run 0W-40 again and this engine doesn't use any oil at all, regardless of weight (I add about 1/2 quart in a year).

 

[Blue_Angel]

Originally Posted By: Trav
Engines are designed to operate within a wide viscosity range, the fact that multi grades are spec'd proves that.


Multi-grades are spec'd to NARROW the operational viscosity range, not WIDEN it.

The ideal oil would remain at the same viscosity at all temperatures.