It's a mix really. I have typically gone 7,500 to 10,000 miles using Euro rated or a 20k rated full synthetic for gas engines. Just know this oil is going to be robust even for a semi synthetic so wondered if I could push it past 5k. I think there is elevated oxidation that can take place with...
How long would you run this oil in a 4runner that holds 6.6 quarts given it's dual rated oil? I know it's a blend but it will be more robust (solid hths and starting TBN etc.). Just 5k or extend it? 4.0L V6 is port injected and easy on oil.
I don't see why folks get up in arms about the facts of HTHS levels and thicker films protecting better. LSJr isn't going to buy you a new engine. Xw20 can give you good results when used appropriately in the right applications. Some would rather get a fraction less MPGs and have less wear 100k...
Castol edge and extended performance look to be on rollback online and the 6 qt. Havoline Pro DS is old price if you get a double pack or better. Get these low prices while they last i reckon.