oil flow question on gm 5.3

[Soundguy]

this is a semi update on my 2000 gmc yukon.. 180km 2qt/3000m oil drinker since new.. ( but that's normal for that gm engine.. )

I switched her to synthetic oil recently.

i pulled a oil sample fromt he last drain to see what the dino oil I have been using in her was at... I'm going to pull a uoa on her with this syn as a comparison. I was thinking of doing it at mid way thru the exteded interval, and toss on a new filter as they are cheap.

question.. the oil filter hangs straight down as you lay under the vehicle.

instead of pulling the drain plug to get a sample.. what kind of flow am I looking at on that filter change out.. will it run till it drains the engine.. or will there only be some 'set' amount of oil to ome out when I pull that filter.

this will make a difference as to doing mid interval filter changes plus makeup oil using oem delco filter.. or finding a higher quality filter and running her full interval. will still be doing this uoa just to see where she's at.

didn't mind putting the lil bit of time or expense into my 7.3 PS's that use 15qts each. at the price of valvolene ultra blue full syn hd 5w40 that's alotta lunch money..


opinions welcomed..

soundguy

 

[kevinj]

I do not think you will get much oil from the filter change.

My old 5.3 let out about cup or so as I recall.

 

[Soundguy]

ok.. didn't know the shape , location or size of the gallies that enter / exit the filter head.. not sure how much I was expecting to drain on just a removal.

 

[kenmac]

If you hadn't done it yet. You may want to change the synthetic out a couple times to make sure you got all the dino out. If this is the 1st change since going from dino. you will not get a full synthetic UOA. It will be a mixture of dino/ synthetic.. When I send in UOA in the wife's car. I just run xxx miles & change instead of pulling a sample. On my diesel. I have a drain cock

in the oil pan that allows me to control the oil flow to be able to pull a sample

 

[Dmace]

If you only want a small sample, siphon it from the filler.
Also, I agree with running a couple of oil changes in synthetic before pulling a sample for UOA's. What oil weight are you running?

 

[Diamondpilot]

We have pulled samples of just about ever type of fluid by doing as Dmace said. On oil we just cut a piece of 1/4" of hard plastic pipe like that used to hook up a Ice Make at a 45 deg angle, shove it down the dip stick tube, and siphon it up.

Chris

 

[Soundguy]

If you only want a small sample, siphon it from the filler.
Also, I agree with running a couple of oil changes in synthetic before pulling a sample for UOA's. What oil weight are you running?

10w30

 

[clemsonfor]

You may as well go to 5w30 on that. 10w30 is outdated. I still run 10w40 in stuff i want the thicker oil in, like my old 30yr old chevy truck, but that yukon is new style and technology. It will only benefit from 5w oil on startup, at least thats my opinion and this web site if full of those.

 

[Soundguy]

You may as well go to 5w30 on that. 10w30 is outdated. I still run 10w40 in stuff i want the thicker oil in, like my old 30yr old chevy truck, but that yukon is new style and technology. It will only benefit from 5w oil on startup, at least thats my opinion and this web site if full of those.

i know it's specced for 5w30.. 5w30 .. it drinks that 3 quarts per 3000m... that's whay I went to 10w30.

with a syn oil.. the 10w30 should be fine for startup lube... way better than dino 5w i'd think.. not much worth of an energy saving oil that drink half it's crankcase ?

 

[clemsonfor]

OK so there is a reason, its still odd that it burns 50% more on 10w30 as its still a 30w oil once its warmed up, which is my guess where its burning it and not on start up.