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- Plano, Texas, USA
Yes, after I reviewed the Service Alert No.: SA-055/20 and TSB No.: 01-020/18 related to DTC P0524 stored for low oil pressure, your dealer does have their point and they followed the specs listed in the SA and TSB for 2018 CX-5 2.5L with cylinder deactivation:Check with dealer on this. They used TSB SA-055/20. In that TSB:
Oil pressure (reference value)
Lo: 135-165 kPa {1.38-1.68 kgf/cm2, 19.6-23.9 psi} [1,500 - 1,600 rpm]*
Hi: 225-275 kPa {2.30-2.80 kgf/cm2, 32.7-39.8 psi} [4,500 - 4,600 rpm]*
Oil temperature: 80-90 °C {176-194 °F}, Coolant temperature: 80-90 °C {176-194 °F}
I asked about discrepancy between these values and those in the service manual yrwei52 kindly provided. Response was they can only go by the trouble code and the tsb provided by Mazda. Possible the service manual values were not for the 2018 engine with cylinder deactivation?
Lo: 135-165 kPa {1.38-1.68 kgf/cm2, 19.6-23.9 psi} [1,500 - 1,600 rpm]*
Hi: 225-275 kPa {2.30-2.80 kgf/cm2, 32.7-39.8 psi} [4,500 - 4,600 rpm]*
But you want to follow up the oil pressure measured on the low side at 1,500 rpm from your dealer as they should check the oil pressures both low and high.
But the question is still, your 2.5L has been having low oil pressure since new with below the spec ~26 psi @ 4,500 rpm and the CEL with DTC P0524 stored. Your Mazda dealer had failed to follow the TSB issued on 10/18/2018 checking the oil pressure low and high, and they’re responsible for the possible damage to your engine. This definitely has hurt the longevity of your engine.