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Old 09-07-2021, 03:42 PM   #1
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Join Date: Jan 2014
Location: New Jersey
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Questions on digital oil level sending unit

2 weeks ago I was at Watkins Glen for a HPDE and I had the blue smoke cloud from AOS flooding on the sharp left downhill turn 6. My check engine light came on, and stayed on the whole 250 mile trip home. but now it is out. I think my digital oil gauge may be faulty. I have the Mantis Sport oil sump extension kit 1, which adds 1.2 liters of sump capacity, and I started the event with the digital oil level one bar below full. But when the digital oil level gauge shows one bar below maximum, or maximum, the physical dipstick shows the level is above the top notch on the physical dipstick. The AOS only has about 15,000 miles on it and my car is going into the shop to be looked at and have the oil changed in a couple of weeks. So I'm starting to think the sending unit on the digital oil level gauge is a bit wonky, and I had an issue at the track because the engine was over filled. I have been using Red Line full synthetic 15W-50.

I tried searching and saw some posts where people thought the type of oil they used affected the digital oil level. I also found that the digital oil level sending unit is a long cylindrical device that is installed from the top of the engine, underneath the intake manifold, and it looks like the intake manifold needs to be removed to change the oil level sending unit.

My questions are, does the type of oil used really affect the operation of the oil level sending unit? Is there any way to test the operation of the oil sending unit, including inspection by dropping the oil pan? My shop has already advised me I can run a lower oil level with my deeper sump, and that's what I plan to do going forward. If there is no easy fix for the oil level sending unit, I may end up just relying on the dipstick and ignoring the digital level.
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