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Thread: Oil temps at sandwich plate

  1. #1
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    Default Oil temps at sandwich plate

    What do you guys normally have as a do not exceed oil temperature value? I have a cool gage w/ a two stage warning light that I want to set values. It's a miata with no oil cooler and temps taken at a oil filter sandwich plate.

    img_1389.png



    Thanks

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    Senior Member robburgoon's Avatar
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    Chickening out at 320*F is probably a good idea if not lower.

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    Senior Member bellwilliam's Avatar
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    most factory has a default oil temp warning at 280F. but with modern synthetic, 300F is fine.

    I would set 1st stage at 260 (worth a look, but nothing to worry about, might back off if in practice), 2nd stage at 290 (need to back off unless predictive shows a PB coming up !!)
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    fe4
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    I think my car is supposed to throw a warning at 320*F, but I have never managed to get over 31X*F

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    Kam
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    oil analysis will help you determine that, since some brands of oil react differently than others to temps.

    ie. Brand Y will start breaking down at 280', while Brand Z will start breaking down at 250'.


    For me, pushing it at a track day, I'd back off at 280', keeping a close eye on it at 260'. This is with both Mobil1 and Rotella, 0w30 and 10w40 respectively.
    4.6lbs / whp -- 4lbs / bhp

  6. #6
    "Shoe"
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    Depends on where on the sensor is - pre or post cooler?

    If it's post cooler, the temps need to be MUCH lower. Ideally you should measure temps in the oil pan and be <300*F, <270*F is much better.
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    In my opinion, I would continue to seek a solution until oil temps peak BELOW 300F - ideally peaks should be below 275F. As other have mentioned, modern oils are much better at resisting breakdown but there are additional consequences of high oil temps including higher cylinder temps, more taxing of the coolant system, and overall heat soak concerns. Get yourself a high quality cooler from a manufacturer who publishes their statistics including delta pressure drop across the cooler (you want this number as low as possible.) Setrab is an excellent brand choice.

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