5w40

  1. T

    5w40 vs 5w30 for 3.5 HO?

    There are some people that swear by 5w40 for the 3.5 HO's ("Raptor" engine). We have a 2022 Timberline I don't care about fuel mileage. Goal is to put the oil weight that will protect the engine better. I run Lubrication Engineers or Amsoil with a OE filter. Thanks in advance.
Top