ontario said:
I guess the yanks dont really use motomaster, so i would like some canadians to give their opinion of their motomaster experience.
Keep in mind the fact that marketing tends to be country-specific. The same product can have different names, depending upon where it is sold. Motor oils have more brand monikers than almost anyone could keep straight, without a scorecard. As kjax74k3 has implied, quite correctly IMO, there's no small amount of bullsh....err...that is...marketing expertise to contend with. The oil either has a compatible formulation or it doesn't. At one point, seeing a new API spec meant that you were getting better oil. Nowadays it's used to supplement the tidal wave of "marketing expertise"
AMSoil is supposed to be the best, but at close to $12/quart seems kinda pricey. Mobil 1 rates very close for about half the price. What I find very interesting is that while everyone else jacked-up oil prices by 100-200% AMSoil's price hit was "only" 20%.
When TEL (tetra ethyl lead) first disappeared from pump gas, there were all kinds of rumors...including dissolved head gaskets:35: Reality was different. Valve & seat recession was the main issue and not with every engine. It was mainly engines with cylinder heads of early `60s to early `70s vintage. Outside of that window, the metallurgy was spec'd to deal without TEL. Lead doesn't go away very quickly with old engines. A lot of them had enough residual TEL in minor sludge deposits to protect the valve seats for years. Valve problems usually only occurred in engines that were run hard, otherwise, the valve/seat never saw high enough temps. The prevention was simple enough, too: hardened valve seat inserts or .1 grams of lead/gallon of gas. Zinc dialkyl dithio phosphate is like TEL but for flat tappets and bike trannies. I know of no substitute at present. Those of us with classic musclecars are stuck paying $10 per oil change for Znddp. That ought to be enough for 5 oil changes in a CT70 motor. It's just a "scratch shot". You're no further ahead than just paying the extra $2/quart from the get-go.
Just so there's no misunderstanding of why I still run GN4 oil-
It boils down to sticking with what works plus $6/qt is still less than $10-12 quart and I'm a big believer that frequent oil changes do more to extend engine life than the more expensive oils. They may be better, but contaminants will reach unaccpetable levels long before the oil can be run long enough to break down and lose lubricity, unless the engine is overheated.