1 quart/6K miles is not a problem.
If it's down 1/2 a quart and you add 1 quart you are adding too much.
The crosshatched section helps make it easier to see the oil level.
----- Original Message -----
> I'm trying to gauge the oil consumption on my 2008 Mustang Bullitt (looks
> like about 1qt./6K miles). Anyway, at 2.5-3K miles I'm usually down half a
> qt., so I add a qt. The dipstick has two holes--min and max--and a
> cross-hatched pattern in between with no markings. So, I go to the owner's
> manual and read that, as long as the oil is above the bottom whole DO NOT
> ADD OIL (this is in bold all caps). Now, I understand why running too low
> is bad, and why running too high is bad, but why doesn't Ford want me
> topping off the oil to keep it at 'full?' Any ideas? The only think I can
> think of is they really don't want overfilling, but I know better than to
> do that.
> As far as I can tell, the crosshatch pattern serves no purpose other than,
> maybe, keeping the oil from running off the dipstick.
> Bob Spidell - San Jose, CA
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