No oil change for 7 years!

Thing is, I could sell you car, tell you I've serviced it religiously every year/3000 miles and show you a comprehensive spreadsheet I've kept for the last 20 years. But that would take me five minutes to knock up and provided I stuck fresh oil in it a week before you turned up, you'd never know the difference.
If the car runs well, has no knocks or rattles then you take a risk whichever one you buy.
 
I am assuming your car has a dipstick. A lot of newer models don't so how on earth you can check condition of oil when purchasing would seemingly be impossible .
 
Beerman said:
Oil degrades over time.

17,000 miles is already quite a long time with the same oil. If it is the same oil and thousands of miles have been done with the oil well past its best, I'd walk away.

With cars of this age and value there will often be holes in the service history. A 7 year gap is too long for me.

No date stamp on oil filter housing or air filter?
 
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