quote:You will--compared to M1 5W-30-- get an A3 rated oil with a higher viscosity at operating temps, a higher HT/HS, a cutting edge chemistry (see Terry's remarks from testing) and a superior UOA track record even in head to head comparisons with M1. Obviously you are not going to do evil to your motor on M1 but if you want the better oil, GC is it.
Originally posted by kcryan: Im considering switching my 98 Infiniti I30 (same as a maxima) to GC from M1, i usually use M1 or Pure1 filters and go 5k miles, mostly short trips. I currently use M1 5w-30, what advantages and what disadvantages will i get with GC over M1
quote:Generally a switch of one grade (30 to 40w) will impace MPG by maybe 1% to 1.5%.
Originally posted by dkryan: kc, What kind of gas mileage are you getting, on average, in your I30. Premium unleaded? The reason I ask is I have a 2001 I30 with 50K miles that always had Mobil 1 0W30 or 5W30 in the crankcase, until 42k. I switched to Saab's 0W30 long-life full sythetic turbo oil in April '04 and watched my gas mileage drop from an average of 23 to about 19 mpgs. I blamed the new Turanza LS-H tires, in part, but mechanically, everything on the car is quite sound. I changed it again in October '04 and I'm still running it until mid-May, when I'll switch back to Mobil 1 5W-30, just to see if that changes the mpg average. I'm not knocking GC (I have some of the '05 stuff I wanted to try), but it might be a really thick 30 wt. that is noticeably different from the "thin" Mobil 1 5W30 you're using. I'm interested in hearing how it works out for you if you switch.
quote:I'm interested in knowing what generation/trim your Civic is. My 2000 SiR has/had been "lubricated" by M1 5W30/10W30 (4800km - 75000km), GC (75000 km - 85000 km), and 0W40 Lubro Moly (85000 km - now). Honestly, I haven't noticed any "significant" difference in terms of mileage or performance (butt-dynoed-wise , though this is totally psychological) among the 3 brands. However, my subjective "start-up" noise level comparison is as follows: M1 > GC > Lubro Moly. [ April 20, 2005, 01:08 PM: Message edited by: MMX ]
Originally posted by 2x: If you go from a M1 with a cSt @ 100º C of 10 to GC with 12, that is a 20% increase. When I did this switch on my Honda Civic my MPG's cratered and the car felt as if I was towing a trailer. Switched back to M1 and the car got it's MPG's back and it felt like a Ferrari in comparison. Just because an oil is a "great" oil does not mean it will be great in all applications.