Bob, with oils it seems the problem is to buy oil that does not have additives. The additive package is what the oil companies use as their "marketing point of difference" - remember the Castrol ads "Oils ain't just oils". Buying a non-additive oil is thus a problem.
Your point about Chain Saw bar oil is noted thanks.
When I got my first car, 20W40 was the standard oil as was 90 weight gear oil. Neither are made now. The closest you can get to the former IIRC is 15W40 in synthetic,
and the latter is 80W90: despite any manufacturer's claims, it pour like water and it is the additive package that gives it the viscosity. One thing I know for sure, the wider the multi-viscosity the quicker it leaks out in the older vehicles.
The Penrite company do a whole range of "older" oils for collector cars, product is based on decade of manufacture of the car.
So for oil issues I find myself having to shop for Penrite.
They actually make a Veteran spec oil (up to roughly 1919) and it says on the bottle to change it no later than 500 miles of use! That gives an idea of how much difference the additive package, detergent and an oil filter makes when current oil change intervals are around 10,000km (6,000 miles for the Americans reading this). Easiest way to get minimal additives is to go for hydraulic oil, but it typically comes in 44 gallon drums or ISO cubes as most hydraulic devices are losey or large or both.
Auto tranny fluid is hydraulic oil, but with additives, I have plenty of it but can't use it in lathe.
Your point about Chain Saw bar oil is noted thanks.
When I got my first car, 20W40 was the standard oil as was 90 weight gear oil. Neither are made now. The closest you can get to the former IIRC is 15W40 in synthetic,
and the latter is 80W90: despite any manufacturer's claims, it pour like water and it is the additive package that gives it the viscosity. One thing I know for sure, the wider the multi-viscosity the quicker it leaks out in the older vehicles.
The Penrite company do a whole range of "older" oils for collector cars, product is based on decade of manufacture of the car.
So for oil issues I find myself having to shop for Penrite.
They actually make a Veteran spec oil (up to roughly 1919) and it says on the bottle to change it no later than 500 miles of use! That gives an idea of how much difference the additive package, detergent and an oil filter makes when current oil change intervals are around 10,000km (6,000 miles for the Americans reading this). Easiest way to get minimal additives is to go for hydraulic oil, but it typically comes in 44 gallon drums or ISO cubes as most hydraulic devices are losey or large or both.
Auto tranny fluid is hydraulic oil, but with additives, I have plenty of it but can't use it in lathe.
