We are the proud new owners of a 2012 Toyota Tacoma with the 2.7 4 cylinder and 4 speed automatic transmission. Has 57k miles on it, maintained at the dealer with whatever they used (presumably 5W20 since that's what's on the dipstick cap). This truck will mostly be used as a second vehicle, also hauling light stuff but about once a week it will need to tow ~1,000 lbs of animal feed, as well as pulling a small pop up camper now and then. I'm already going to swap out the trans fluid with MaxLife (dealer said it's never been changed, as it's "lifetime" fluid... we all know how that goes) and install a trans cooler, but some of the folks on the Toyota sites are saying that a 20 weight isn't sufficient for towing and I should bump it up to a 30. Now I'm perfectly content to run what the manufacturer specifies (yes, I know I violate that by running 15w40 HDEO in my Cavalier, but that's because the engine is old and it's the only thing thick enough to not leak out all over the place) as long as I'm not doing any damage to the engine, and I've already read that 20 weights are specced because of fuel mileage, not longevity.
