Looking for oil counsel on a Toyota 5.7 that will tow (travel trailer) up some steep mountains in 95 to 100 degree temperatures come summer. Toyota specs 5W-20 oils. This will be my first foray into something that thin, especially while working an engine in those conditions. Sump is 8 qts., so I won't go the boutique route simply for cost.
Looking at about 10-12,000 miles on the truck each year and will probably do full synthetic OCIs every 6 months. Winter temps as low as single digits, but very rarely below zero.
To complicate the issue somewhat, I have a stash of Mobil1 AFE 0W-30 I'd like to use up and won't otherwise have a use for. I could give it to my neighbor for Christmas, but have also thought about mixing it to thin it out. I suppose it could be mower oil, but that seems a bit like feeding the dog prime rib.
Thanks.
Looking at about 10-12,000 miles on the truck each year and will probably do full synthetic OCIs every 6 months. Winter temps as low as single digits, but very rarely below zero.
To complicate the issue somewhat, I have a stash of Mobil1 AFE 0W-30 I'd like to use up and won't otherwise have a use for. I could give it to my neighbor for Christmas, but have also thought about mixing it to thin it out. I suppose it could be mower oil, but that seems a bit like feeding the dog prime rib.
Thanks.