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Message: <blockquote data-quote="J-Long" data-source="post: 50064" data-attributes="member: 6352">The first thing I would do if I thought there was an oil pressure problem is gauge it..   see what you're actually dealing with in terms of pressure.Previous owner changed the oil between the time I bought machine and took delivery. I thought that was odd that he would just up and change the oil but now I think he knew it had this problem.Yeah, I hate to say it.. But I think you're right. I know with come cars it took less than 5psi to put the light out. When they had bearing wear or other internal issues that caused low oil pressure that low at an idle, they'd substitute thicker oil to bump the pressure up enough to put the light out and sell it.   It's a terrible practice, but I've seen it happen.  You may be in the same situation here.Further, if the light does not go out at all, don't run it..  Because you may not have any pressure and, from what I gather the Deutz (I've got one too, I'm just now learning about it.. And the first thing I learned is it's costly!) is expensive enough to rebuild..  Let alone if you trash the shortblock from lack of oil.  If it were me, the next time I started it, it would be to gauge it cold...My 2 cents. Good luck!</blockquote>