Ripping straight from the sticky..
1. MY06 Subaru Impreza 2.5i 5MT with ~44k on the odo. Explicitness: NON TURBO
2. ILSAC GF-4, API SM Energy Conserving (recommended, likely cause subaru's fleet MPG is poor). 5w30 recommended, other grades mentioned are SAE 30, 40, 10W50, 20w40, 20w50. Severe service change interval is 3750 miles, normal is 7500.
3. Moorhead, MN (Fargo, ND) -40F or lower in the winter, 100 or more in the summer.
4. Typically drive easy, but I suspect my definition of "easy" falls into the hard and fast category.
5. I am currently doing pizza delivery, so a lot of short trips where (depending on how busy we are) the car may or may not still be warm from the last lap of town. Typical day is 75 miles of that. I also do autocross/rallycross/odd track days during the summer.
6. No known problems (knock on wood)
Car has, so far, seen Mobil 1 dyno (dealership fill out of a drum, stopped using that cause I can't buy spares, also burned off quite quickly), Amsoil Hi-Perf 5w30 (can't remember why I stopped, but this was before I was doing deliveries), currently running Castrol GTX dino (cheap and -was- everywhere, in the last month or two all of the local gas stations stopped carrying it.)
Fuzzy logic here being, if I can't pick up my Castrol without making a special trip anyway, might as well see if there's anything better for my usage. I'm not opposed to ordering online in bulk either.
As far as my preference in oils... I think from the above, its clear I put my car through a lot of abuse (or at least, hard conditions. I do try to be sympathetic to it, though.) I would rather it survive than have some small percent MPG increase. Synth or conventional, whichever does the job. I'll still be changing it at 3750, just for peace of mind, regardless of the type.
Thanks in advance.
1. MY06 Subaru Impreza 2.5i 5MT with ~44k on the odo. Explicitness: NON TURBO
2. ILSAC GF-4, API SM Energy Conserving (recommended, likely cause subaru's fleet MPG is poor). 5w30 recommended, other grades mentioned are SAE 30, 40, 10W50, 20w40, 20w50. Severe service change interval is 3750 miles, normal is 7500.
3. Moorhead, MN (Fargo, ND) -40F or lower in the winter, 100 or more in the summer.
4. Typically drive easy, but I suspect my definition of "easy" falls into the hard and fast category.
5. I am currently doing pizza delivery, so a lot of short trips where (depending on how busy we are) the car may or may not still be warm from the last lap of town. Typical day is 75 miles of that. I also do autocross/rallycross/odd track days during the summer.
6. No known problems (knock on wood)
Car has, so far, seen Mobil 1 dyno (dealership fill out of a drum, stopped using that cause I can't buy spares, also burned off quite quickly), Amsoil Hi-Perf 5w30 (can't remember why I stopped, but this was before I was doing deliveries), currently running Castrol GTX dino (cheap and -was- everywhere, in the last month or two all of the local gas stations stopped carrying it.)
Fuzzy logic here being, if I can't pick up my Castrol without making a special trip anyway, might as well see if there's anything better for my usage. I'm not opposed to ordering online in bulk either.
As far as my preference in oils... I think from the above, its clear I put my car through a lot of abuse (or at least, hard conditions. I do try to be sympathetic to it, though.) I would rather it survive than have some small percent MPG increase. Synth or conventional, whichever does the job. I'll still be changing it at 3750, just for peace of mind, regardless of the type.
Thanks in advance.
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