I switched from regular 5w30, to Castro Synetc (part synthetic oil)a few months ago.

I noticed my oil pressure dropped since then. It now hovers around the 30psi mark. And sometimes drops when deaccelerating. anyone?

 

Hmmm.... I run Valvoline synthetic 10w30, and I get a constant 45psi while cruising, and 60 when the car is cold and warming up. 5w30 is too thin, IMO, for a motor with any decent number of miles on it. Mine has 87k.

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91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

MoreMoodThatMod

 

i run 10w40 and change it every 2k


-Stell

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1988 IROC 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans , K & N, 160 Thermostat+ Temp Switch
And Always Trying To Go Faster

 

Should be around 25 psi idling and 50 to 55 cruising... you might want to just swap out your sending unit before you start getting really excited, those go bad alot

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"So many Mustangs, so little time..."

 

Thanks guys for your help. RB83, good thinking. I will replace oil sending unit.

thanks