Question: Why does my 94 take 8 quarts of oil?? - Page 2 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 12-01-2019, 02:54 PM   #11 (permalink)
Glagulator
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95-DIPSTICK-INFO.jpg

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Old 12-01-2019, 07:02 PM   #12 (permalink)
Chicagomike
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well...Looks like its got the right dipstick and dipstick tube, etc...

Guessing there must be some 94's that do in fact take 8 quarts...can't think of any other explanation....any thoughts, advice??

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Old 12-01-2019, 09:38 PM   #13 (permalink)
crankme69
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Look at that mounting tab...if the stick tube is moved up and down into the block...the reading will change significantly
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Old 12-02-2019, 10:58 AM   #14 (permalink)
JMJNet
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Check the oil cooler lines?
They are prone to leaking where the rubber crimp to the metal tube.
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Old 12-02-2019, 12:08 PM   #15 (permalink)
johnH123
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I have an upgraded filter on mine... its a bit larger. If you have a large filter, it will make the capacity go up.
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Old 12-02-2019, 09:17 PM   #16 (permalink)
Chicagomike
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still trying to figure it out...

Thanks for all the good suggestions. Here's where I am at--checked tab and fit of the dipstick tube--appears normal. no jamming, etc...

The oil lines are not leaking...supposedly done about a year ago--but I did doublecheck and there are no leaks anywhere. Keep in mind the oil level I checked was immediately after putting in the oil--so also no time for any mysterious consumption.

New oil filter is smaller than the older one--the new one I put on is a WIX XP--which appears to be a little shorter than the old ac/delco filter..

so....for now --I've decided to fill to dipstick level--ie--8 quarts. I'm pretty leary about running it a quart low (by dipstick). I appreciate all the help--you guys are all great to take the time to post on such a weird trivial issue. But--I surely don't want to overfill--and I don't have nearly the knowledge of this group.
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Last edited by OkDually; 12-02-2019 at 09:32 PM. Reason: sig
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Old 12-03-2019, 12:27 PM   #17 (permalink)
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At the end, I don't think it will be detrimental at 8 Qts.
Now, if it needs 12 Qts, then it will be a different story because the pan is not that big.

I think it is well within the tolerance.
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Old 12-03-2019, 05:36 PM   #18 (permalink)
old6500td
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^^^ plus 1.......when I checked some time ago...the oe part#s for the oil pan seemed common across most models from early year like yours to late (8 quart) models.

It seemed the only main change to accommodate the higher oil quantity was a change to the dipstick /tube..........Manufacturer advertising at the time said the increased level of oil was to provide better serviceability across service interval/less maintenance etc.
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Old 12-03-2019, 09:10 PM   #19 (permalink)
56pan
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Quote:
Originally Posted by johnH123 View Post
I have an upgraded filter on mine... its a bit larger. If you have a large filter, it will make the capacity go up.
I'm a believer in the big filters on these engine. Usually use a Purolator L40084 or one by WIX of the same larger capacity. https://www.oilfilter-crossreference...rolator/L40084
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Old 12-03-2019, 10:44 PM   #20 (permalink)
heymccall
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I could run a PF25 or PF35 (I think those were the numbers) on my '82 6.2 2wd. One held a 1/2 at or more of oil than the other.

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