There are a lot of lubricants on the market that will provide great protection.
You have to decide for your self what works in your area.
I live in Alabama, the weather is worm, so I use Chevron Delo 400, 30w
year around. We in the Auto, Truck repair line, would never use anything
less than 15w-40 because of the heat and pounding a engine gets. If your
using a less viscosity like 10w or 5w and your engine is rattling or noisy on
start up, then the viscosity your using isn't heavy enough, and most likely
the damage is already done. I know this is a sore and missunderstood subject
so this may help some. Most any diesel type oil for a diesel will lube all the
engine parts well, except for the crankshaft. This is a question I used on
interviews when hireing a new tech. What is the actual bearings on a crankshaft? No one gave the correct answer. You have main inserts, and rod
inserts. They are spacer shims for the correct tolerance. The actual bearings
on a crankshaft is.....engine oil under pressure. The crankshaft floats in a
pressureized layer of engine oil. When a engine gets to operating temp then
the oil is somewhat thinner, so the thinner or lower number viscosity your
using means you have less crankshaft protection. You have to have viscosity
for cushion of parts, along with high lubrication, two different items.
The first number on the oil is the viscosity, W is for winter flow.
I wont go any further with this because of the different opinions of this
subject. Hope this helps clear up some wrong thinking, and proves to those
that are on the correct track.
