Initial Oil Sample
Thread Starter
Instructor
Joined: May 2022
Posts: 118
Likes: 102
From: Allendale MI
Initial Oil Sample
Evening! Changed engine/trans oil and filters myself at 1600mi, just because I wanted to. Sent in the oil samples to Mobil labs. Engine oil was showing some fuel dilution. Mobil can’t test the Trans fluid, so no results there. I figured the silicon would be high (adhesives, sealants and castings), but I was surprised at fuel. Anyone else sample the first change and experience this? Just sharing as an FYI for my forum friends.
Last edited by derbs24; Aug 15, 2023 at 09:03 PM.
Drifting
Joined: Feb 2023
Posts: 1,354
Likes: 1,116
The sampling data indicates this is a 5.5L which means your car is a Z06, yet the test sample is listed as 0W-40. The factory fill on a Z06 is 5W-50. Which do you have, a Z06 or a Stingray?
Last edited by Mitchell_B; Aug 14, 2023 at 10:44 PM.
Safety Car
Joined: Jul 2019
Posts: 4,079
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From: Florida
Race Director
Joined: Feb 2011
Posts: 14,717
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From: AZ
His public profile says 2023 Stingray, so it would be 6.2L and 0W-40 oil. It is possible that the oil sample was not taken after the car was fully warmed up which would give the fuel residual in the oil to "evaporate".
We need more info from the OP.
We need more info from the OP.
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The high silicon level on a new engine can be from the hypereutectic piston material and the sand casted block. The fuel in the oil is most likely from the overly rich conditions that occur during high load operation. All modern engines that run high compression will use a low AFR to reduce combustions temp.