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mobile 1 FULLY synthetic

I'm 03 Z owner . i use Mobile 1 fully synthetic . i wonder if the oil changes our cars' performance because when i use 4 liter of oil after changing filter the highest speed i could reach was m150 Mile/hour = 240 kilo/hour. i also noticed the oil pressure gage was at 90 PSI (the third quarter). 3 days ago i changed filter and oil but this time i went 4 1/2 liter instead of 4 liters only, now i noticed the oil pressure gage gets to 120 PSI when RPM goes over 4 rpm.

i wonder now is that going to change the top speed of the car...?

i wanna know if it's fine to use 4 1/2 liter in my Z ?

is it normal for the oil pressure gage to reach 120 PSI ? and what it should read when the car is running ?


regards

MAT
:cheers: :irock:
 

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Our engines take 4.5 quarts of oil, and that is the recommended dosage.

Oil pressure reading at 120 PSI is normal depending upon RPM. I believe mine reads close to that at this interval.

As far as top speed, that is limited to drag, so it really depends upon the gust of wind heading towards you or in your direction.
 
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