Amsoil ASL 5W-30 and TSO 0w-30

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Nov 16, 2003
Andover MA US
For the last year and 5 months I have been running Amsoil ASL 5W-30 in my Nissan V6 3.5L and my Honda V6 3.5L. I drive about 8K miles/yr (short in town trips and maybe 1 road trip) on the Nissan and >12K miles/yr (short in town trips, long road trips, and <1K miles towing) on the Honda. Would there really be a difference to switch to TSO 0W-30 or am I better off with staying with ASL 5W-30? The Nissan has 15K on the odo and the Honda has 26K on the odo. [ December 01, 2003, 11:38 PM: Message edited by: caremd99 ]
Since you're changing Amsoil on the basis of time rather than mileage, I'd stick with the 5w-30. The 5w-30 now meets the most stringent ACEA, A3/B4 specifications and the high temp properties have been significantly improved with the last formulation upgrade last year. For example, Noack Volatility (high temp evaporation), has been reduced from 7% to only 5.1%. So you should see reduced oil consumption and better viscosity retention over long drain intervals. The Amsoil 0w-30 will certainly work well in both these motors, but I don't think it will be more cost effective with the relatively short drain intervals you are doing. Tooslick Dixie Synthetics
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