Well I changed the oil in our Taco over the weekend.
I had bought a case of "Royal Purple" synthetic for my FJ Cruiser so I used the rest of the case to switch the Taco over to synthetic also.
Whoops.. looking at the owner's manual (after the fact) I realize Toyota specifies 5W-20 for the 4- cylinder. I put in 5W-30.
Doing some research I don't know if I totally screwed up or if it is no big deal. I did find this......
|"No. You do not need to use a 5w20 oil. The only reason 5w20 was specified for your engine is to increase the CAFE (Corporate Average Fuel Economy) reported to the Federal Government. CAFE is the combined average fuel economy of all of a vehicle manufacturer's product line"|