Originally Posted by aleks_r
I just purchased a IS350 AWD and should be getting it this following weekend, i live about 1 hour south of toronto Canada. I was wondering if the all season tires that come with the car will be able to handle the snow ? It only gets about 3 months of snow here and i was thinking the AWD would help it enough where i wouldnt need snow tires ??
Also what kinda gas do you guys use ? 91 octane , would 89 octane be good enough ??
AWD is over-rated for how much it helps in snow.
All-seasons are vastly over-rated for, well, everything.
AWD can help getting started from a stop in snow.
It does exactly nothing
to improve braking in the snow though...tires do.
RWD with snow tires is a lot better option than AWD with all-seasons for example.
If you'd like some info on how badly all-seasons suck as a compromise compared to dedicated summer and winter tires I refer you here:
Tire Test: All-Season vs. Snow vs. Summer
Snow tires outperform all-seasons in virtually every snow test by roughly 20-25%.
Summer tires outperform all-season in every wet test by a significant amount (in fact all-seasons come in THIRD behind the snow tires here)
Summer tires outperform all-seasons in nearly every dry test too.
As to fuel, the car is designed and programmed for 91 octane.
Using anything lower is a bad plan, using anything higher is a waste of money.
Higher octane will offer no benefit for higher cost.
Using lower octane will offer reduced power and possibly reduced mileage (thus negating the 'savings') while also doing tiny damage to the engine. The damage part will no matter to you if you're the sort that gets rid of a car every 3 years since it'll never be enough to notice in that time, but the reduced power and mileage will matter all the time.