Toyota V8 4.0L: 11 years old with 90,000 miles
Toyota V6 3.0L: New with 2,000 miles
The owner's manual for both states either 5w30 or 10w30, with 5w30 "recommended".
My assumption is that 5w30 is recommended for all-weather protection. Where I live, the temperature is between 50F-90F year-round.
Does this make 10w30 the better choice?
I'm pretty sure it does for the higher mileage engine. But am not sure for the new engine though.
I've bene using 5w30 in both cars.
A couple of related questions:
1. Are VIs still a factor between 5w30 and 10w30 with SL rated oils? Or does it vary by manufacturer? The main reason to go with 10w30 would be less VIs. But I read somewhere there's no longer much of a difference between 5w30 and 10w30.
2. I hear 5w30 is more "fuel economic" than 10w30. Would the difference in fuel economy ever be noticeable?
3. For a car that's not driven often (once every few days), is a thinner weight oil better?
Toyota V6 3.0L: New with 2,000 miles
The owner's manual for both states either 5w30 or 10w30, with 5w30 "recommended".
My assumption is that 5w30 is recommended for all-weather protection. Where I live, the temperature is between 50F-90F year-round.
Does this make 10w30 the better choice?
I'm pretty sure it does for the higher mileage engine. But am not sure for the new engine though.
I've bene using 5w30 in both cars.
A couple of related questions:
1. Are VIs still a factor between 5w30 and 10w30 with SL rated oils? Or does it vary by manufacturer? The main reason to go with 10w30 would be less VIs. But I read somewhere there's no longer much of a difference between 5w30 and 10w30.
2. I hear 5w30 is more "fuel economic" than 10w30. Would the difference in fuel economy ever be noticeable?
3. For a car that's not driven often (once every few days), is a thinner weight oil better?
