I've only owned the car a week, but the previous owner said it was about time to change the oil. He said he put Amsoil synthetic in it...
Anyway, I have Mobile 1 10W30 in there now, and my oil pressure seems significantly higher now than it did when the Amsoil was in it.
Oil pressure was reading about 0.5-1 kg/cm^2 when idle, now it is more like 1.2.
At 3000 rpm, it used to read about 3.5, now it reads more like 5 kg/cm^2.
Now, at higher rpms, I've seen it go as high as 6... I have 5.3 quarts of oil it in, just like the spec is.
So, my question is - perhaps the previous owner had 5w30 in it? Shouldn't matter once the engine is at operating temp though, 10w30 and 5w30 should have the same viscosity at temp...
What does everyone else's gauge normally read at 80-90 mph? Does it get as high as 5-6 and stay there until redline?
By the way, I searched for this, and some threads came up. I've read through them... but none of them really answered my questions... anyone had a large change in pressure after changing oil? As far as I can tell, my oil level was not low when I changed it out... so that shouldn't be it.
Anyway, I have Mobile 1 10W30 in there now, and my oil pressure seems significantly higher now than it did when the Amsoil was in it.
Oil pressure was reading about 0.5-1 kg/cm^2 when idle, now it is more like 1.2.
At 3000 rpm, it used to read about 3.5, now it reads more like 5 kg/cm^2.
Now, at higher rpms, I've seen it go as high as 6... I have 5.3 quarts of oil it in, just like the spec is.
So, my question is - perhaps the previous owner had 5w30 in it? Shouldn't matter once the engine is at operating temp though, 10w30 and 5w30 should have the same viscosity at temp...
What does everyone else's gauge normally read at 80-90 mph? Does it get as high as 5-6 and stay there until redline?
By the way, I searched for this, and some threads came up. I've read through them... but none of them really answered my questions... anyone had a large change in pressure after changing oil? As far as I can tell, my oil level was not low when I changed it out... so that shouldn't be it.
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