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oil pressure difference between 5-30 m1 and 0-40 m1 question

This is a discussion on oil pressure difference between 5-30 m1 and 0-40 m1 question within the External Engine forums, part of the LSx Technical Help Section category; hey my location is killeen tx ,2000 trans am ws6 stock except for fra, fernco (for looks), tb bypass (for ...

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    2k WS6 4A, 2013 Sonata

    oil pressure difference between 5-30 m1 and 0-40 m1 question

    hey my location is killeen tx ,2000 trans am ws6 stock except for fra, fernco (for looks), tb bypass (for looks) and magnaflow muffler ...on brand new 5 30 with new m1 filter i was getting 30~ psi on cold start and after warm 20~psi and after driving 15~ psi now i know this is technically within specs according to gm but..yea lol. sooooo i changed my oil to 0-40 with new m1 filter a week ago or so and now im getting 45~ psi on cold 30-35 at warm idle and 25-30 idle after hard driving (track, stop and go traffic 100+ degrees) and upwards of 35 psi driving around 45 mph at 1200 rpms any reason to why my oil pressure is better now and also now im not consuming ANY oil? which i consumed almost a quart last oil change 3900 miles exactly also getting about almost 30-40 more miles to the tank..no piston slap on start up wtf is this sorcery?! i put it in the external engine bc i think its more pump and related but idfk.

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    The stock PCV system on our cars isn't all that great. It tends to pull oil into the intake so a catch can is highly recommended. As to the differences you have experienced, they seem pretty radical for simply a change in oil weight.

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    I lika da Chevy's LETHALxLS1's Avatar
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    I live in Fl. And run 10/40 but yeah if you put thicker oil in it the pressure is gonna go up.

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    Quote Originally Posted by LETHALxLS1 View Post
    I live in Fl. And run 10/40 but yeah if you put thicker oil in it the pressure is gonna go up.
    thx i kind of figured it was bc its a better shear thicker oil usually tends to have a higher shear but thats just me browsing google lol.. also before bone stock (5-30) usually have 15-20 psi and low 40 psi at wot my 1/4 constant was 13.9-14.093.. but now with fra, tb bypass, pcv valve hoses replaced with 3/8 fuel line cuz wasnt going to pay 100 bucks for the stock one, 0-40, intake gaskets replaced, seafoam no smoke... but w/e and new continentals replacing the front size with 2454017 nd keeping the stock rear 2754017.. no burnouts ....after long interstate drive to dragstrip and not even popping the hood just rolling up and taking the f off i got 2 runs of 13.6 @ 101.5 anything might have helped with those things or mainly the oil and pressure bc i dont think i gained .5 sec of new street tires and worthless free mods

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