Not necessarily, If the presssure gets to high the viscocity of the oil becomes to great (or low) to flow freely in the engine and you have a failure of lubrication. Kind of how a transmission torque converter works. But first of all you need to get actual oil pressure reading with a mechanical gauge and be sure there is a problem.

 

Yes, but that wouldn't happen at 60 lbs. I'd be more worried about blowing out a seal somewhere in the engine. But I do agree in the mechanical gauge. These electric gauges will lie to you when they're new, let alone run thru 40k+miles.

 

The oil filter would act as a relief valve before that happened. Unfortunately, it would relieve itself all over the road...... Ooops. (been there, done that......)

 

I am also running high pressure. I have a Fedex Truck... When I got it i looked over everything and noticed the oil pressure was around 70 when foot in it and 40 at idle... now it is at 80 foot in it and up and down from 40 to 60 at idel. I am getting some oil leaks, I pulled the plug and pulled the spring and regulator out and didn't notice anything out of the ordinary. The spring was over 2 1/2 not compressed and the regulator was okay, it was kind of hard to pull out of the sleeve it sits in but went back together fine. I don't know what else to look for. I will put a mechanical gauge on it tomorrow. any suggestions? This big *** truck scares me I cant afford to break something on this big boy.

 

You are going in the right direction these oil sending units are iffy at the best of times. The mech gauge will tell you what's really going on.

 

Just changed oil pump/pickup ....gonna change my oil pressure switch also...runs good but oil pressure is 80-90 on the gas and 50-60 idle...when high rpm it may shoot up to 90-95....put castrol 50/50 5w30 HM and quart Lucas...so, are those pressures TOO HIGH or normal for 153k?

 

What pump did you put in there? I would skip the lucas..... that stuff is THICK, a lot like molasses, and is notoriously difficult to pump. Might account for your higher than normal pressures......

 

+1 on skipping the lucas. Use a mechanical gauge to get an accurate reading. Your numbers before the oil change looked good.