Mystik 15w50 and a flickering oil pressure light - Defender Source
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  #1  
Old May 1st, 2011, 12:28 AM
Naplm00
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Matthew
1983 110 200tdi 3 door soft top
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Mystik 15w50 and a flickering oil pressure light

Well since I have had my truck (200tdi) when the outside temp is over 70F and I have a hot engine I get a flickering oil pressure light at idle.

Ive been through 2 changes since picked up, both with 15w40 Rotella T. Oil looks black and sooty but normal for a diesel. Oil is being changed at 5k intervals with little to no consumption between changes.

The oil pressure light will go out with the slightest touch of the accelerator. This only happens when im getting off the highway after a long haul or going up a very long hill (3-4 miles).

I am thinking there could be a few things amiss here:

1. Worn or weak oil pump gear drive
2. Oil viscosity is too low
3. Oil pressure sender is crappin out


Well back you my other question, I was thinking of running the Mystik 15w50 semi-syn oil and seeing if this would help with my pressure issue. (hopefully the higher viscosity oil would hold pressure better?) Any one ever used this stuff? I really dont want to swtich to synthetic.

http://docs.mystiklubes.com/msds_pi/M20003.pdf

FYI ive got a blackstone oil kit on order for evaluation.

anyother suggestions on 15w50 blended or dino oils?
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  #2  
Old May 1st, 2011, 12:35 AM
Uncle Douglas's Avatar
Uncle Douglas
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Doug Crowther
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have you considered replacing the el cheapo idiot light sender or installing an oil pressure gauge to see if there is a problem
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  #3  
Old May 1st, 2011, 12:44 AM
Naplm00
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Matthew
1983 110 200tdi 3 door soft top
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Yea thats on my list of options. What are the acceptable oil pressures of a 200tdi?
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  #4  
Old May 1st, 2011, 12:49 AM
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Uncle Douglas
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Doug Crowther
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mine never got below 17psi. Was usually in the 40's on start up cold and once warm around 35psi @ highwqy speed.
The stock warning light sensors are crap. I'd try replacing that first
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