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#1: 03-18-2013, 07:16 PM
Increase Oil Consumption with Extended Oil Change Interval?
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Location: The Nasty Nati
Car: VF52 05 Legacy GT 5MT
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Let me preface this thread by saying this is my first experience with extended oil change intervals.

I changed the oil in my VF52 Legacy GT turbo about 4600 miles ago (recommended 3750) based on a UOA from Blackstone. The analysis was of RP 5w-30 but I have switched to Amsoil Euro Full SAPS 5w-40 (also okayed by Blackstone).

I know these cars like to eat oil but within the past 1000 miles I have added about 2 quarts worth of oil. I checked my dipstick this morning and had about half on the stick...just checked it now (cold) and it was below the low line. I have about a 70 mile commute round trip and do like to get on it every once in a while. I also just got back from a 300 mile round trip this past weekend.

Is this amount of oil usage normal for an extended oil change? Is the oil breaking down or what? The car was compression tested about 4 months ago and had numbers that were a bit low but still in the acceptable OEM tolerances. There is NO oil on the ground and the block and heads are dry as can be. Help!
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