Originally Posted By: aquariuscsm
Originally Posted By: stuka
He put 15w40 in it because he said he thought that's what I asked for. The guy I bought the vehicle from ran 15w40 in it, I mentioned it to the builder and he put it in when he finished the build. He preferred 5w20.
HUGE red flag right there. If he knows what's best for his own builds,why didn't he use it?
Fair question. The person that built it was previously the engine tech at a Ford shop. The person I bought the vehicle from was the service manager at the same shop. I didn't know any of this going into the build, wouldn't have made much difference really if I had. The shop has the reputation as one of the better ones in my area. The guy only does Ford. He bills himself as a dealership alternative. Trained by Ford, 15 years Ford experience, only works of Ford's etc.
At any rate, when I bought the vehicle from the service manager and he told me he ran 15w40 in it all the time, I asked why. His response was "It's a machinists secret and all Ford techs do in their own modular motors." I wasn't convinced, so I didn't. I told the builder what I was told, he said "yeah, that's pretty much true." Therefore, I assume, he assumed that's what I wanted. Even though I told him I drained it and filled it with 5w30 as soon as I got it home. Being that the build ended up taking so long, he may have not remembered everything and just done it. After the leaks and his repair, he had no qualms putting 5w20 back into it.