First a little history on the vehicle in question. Its a 2000 chevy cab/chassis 1-ton truck.Its our service truck at work and only has 44,000miles on it, but developed a rod knock on the last road call. Got it apart, and it spun #7 rod bearing and wouldn't have been to much longer until it spun every other rod or main bearing. One of our other mechanics had just replaced the intake gaskets cause it was leaking coolant externally. Well, apparantly it was leaking internally cause that seems to be what wiped the bearings out. They left this thing go for the past 4 or 5 years. Anyways, I wound up putting new rod and main bearings in it, new crank, and a new oil pump. I really wanted to replace #7 rod and have the block line bored as #2 main bearing and #7 rod got so hot that the rod and area around the main bearing turned blue. Boss didn't wanna spend the money, so I left the top end together and just replaced what I mentioned above. I did plasti gauge the bearings, and everything wound up in spec, so I'll cross my fingers tomorrow when I start it up.
Anyways, boss wanted me to add a bottle of lucas with the oil (chevron 5w30). I know its well documented on here that it really doesn't do anything but thicken your oil, but will it cause any harm? I didn't bother trying to argue with him as he'd never believe me anyways. This is the same guy that thinks theres nothing wrong with Fram filters. I figure we'll change the oil once it gets about 500miles on it to get any left over metal out from when the original bearings went.
Anyways, boss wanted me to add a bottle of lucas with the oil (chevron 5w30). I know its well documented on here that it really doesn't do anything but thicken your oil, but will it cause any harm? I didn't bother trying to argue with him as he'd never believe me anyways. This is the same guy that thinks theres nothing wrong with Fram filters. I figure we'll change the oil once it gets about 500miles on it to get any left over metal out from when the original bearings went.
