I went ahead and changed the oil in my fathers work van today. Its a 94 caravan with the 2.5 4 banger.
The book recommends 10w30 pretty much year round.
I have been doing 3k mile changes with 10w30 supertech dino and supertech filters.
The local walmart discounted the chevron supreme 10w40 down to 88 cents a quart, and I bought about 10 quarts.
I changed the oil in the van with the chevron supreme 10w40 today.
Is it usually OK to run a viscosity a little thicker than the book recommends, as I have done?
It gets somewhat hot here during the summer.
Thanks,
JH