Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Finally located some 0w20 synthetic engine oil

Christ · 06-09-2009, 08:12 PM

Well, it should take less HP to move around, and through, so therefore, you should consistently have better HP figures across the board... obviously more pronounced in the areas that you have next-to-no-torque anyway, so that's not an unusual reaction.

What I found when I switched from 10w30 to 0w30 is that I have slightly better fuel economy 25 mpg to 27 mpg, approx. The engine idles slightly higher (100 RPM or so), apparently as a result of approximated load in the PCM, vs what's really going on, according to the dealer... nothing to really be done about it that won't cost me a fortune, and I don't really care about 100 RPM... it's still under 900 at idle.

I found a good indication that I won't be needing to change my oil for QUITE a long interval... even at nearly 7k miles on this oil, it's relatively unworn by feel. I'll probably send it in for a UOA when I take it out and put the diesel engine in, but my goal is to have the diesel engine ready to go in by the time I need to change this oil from the motor.

06-09-2009, 08:12 PM	#13 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	Well, it should take less HP to move around, and through, so therefore, you should consistently have better HP figures across the board... obviously more pronounced in the areas that you have next-to-no-torque anyway, so that's not an unusual reaction. What I found when I switched from 10w30 to 0w30 is that I have slightly better fuel economy 25 mpg to 27 mpg, approx. The engine idles slightly higher (100 RPM or so), apparently as a result of approximated load in the PCM, vs what's really going on, according to the dealer... nothing to really be done about it that won't cost me a fortune, and I don't really care about 100 RPM... it's still under 900 at idle. I found a good indication that I won't be needing to change my oil for QUITE a long interval... even at nearly 7k miles on this oil, it's relatively unworn by feel. I'll probably send it in for a UOA when I take it out and put the diesel engine in, but my goal is to have the diesel engine ready to go in by the time I need to change this oil from the motor. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"