How many miles with graphite oil?

I put some graphite oil in my 1975 eight- cylinder Lincoln automobile; however, the oil was so black that I became leery of using it. Will the graphite harm an older engine? Does it really increase gasoline mileage by 25 percent, as advertised? When I need to add oil -- not an oil change -- can I use a can of regular, non-graphite oil? Vivian Winterman Jennings, Mo.

You're right when you say that Arco's graphite oil looks bad, but that doesn't mean a thing. It does its job in lubricating the engine, no matter what the car.

It's hard, however, to tell whether or not you will enjoy higher gas mileage; and if so, how much.

The Society of Automotive Engineers, the Department of Energy, and the petroleum industry are trying to come up with a system by which all competing lubricating oils can be measured in terms of higher gas mileage. In other words , right now you have only the word of the manufacturer, whether it be Atlantic-Richfield (Arco), Exxon, Mobil, or anyone else.

A major key to improved mileage on the road is the use of conservative driving habits; an in-tune, well-maintained car, etc.

Can you add a can of regular oil to the graphite oil? You ask.

By all means, but do not mix a synthetic lubricant, such as Mobil 2, with a petroleum-based oil.

Share this story:

We want to hear, did we miss an angle we should have covered? Should we come back to this topic? Or just give us a rating for this story. We want to hear from you.

Loading...

Loading...

Loading...

Save for later

Save
Cancel

Saved ( of items)

This item has been saved to read later from any device.
Access saved items through your user name at the top of the page.

View Saved Items

OK

Failed to save

You reached the limit of 20 saved items.
Please visit following link to manage you saved items.

View Saved Items

OK

Failed to save

You have already saved this item.

View Saved Items

OK