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From totally drained .. with a new filter ... how many quarts does it take?

  • 5.5 quarts

  • 6.0 quarts

  • 6.5 quarts

  • 7.0 quarts

  • 7.5 quarts

  • 7.75 quarts

  • 8.0 quarts

  • I donnow... I let a shop/dealer/quickie lube do it.

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Premium Member
'05 Chevy TB EXT
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4,051 Posts
Discussion Starter · #1 ·
I'm asking for personal experiences here ...

How many quarts does it take to change your 4.2 L engines oil?
 

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Premium Member
2004 chevy trailblazer_lt
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2,347 Posts
As the others have indicated, 7 quarts when changing oil and filter.
 
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Premium Member
'05 Chevy TB EXT
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4,051 Posts
Discussion Starter · #5 ·
In the couple of years I've had my 05TB 4.2 EXT., I think I've changed the oil at least 4 times and it always needs that extra little bit to get it full.

This might be a dipstick anomaly --- I wonder and don't know what to think so far.
 

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Premium Member
2004 chevy trailblazer_lt
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2,347 Posts
What oil filter are you using? I know when I use the factory specified oil filter (or aftermarket) with our Oldsmobile, it takes 4.5 quarts. When I use an alternate filter (a little longer) it takes 5 quarts to hit the full mark. Just as an FYI, the factory specified filter is an ACDelco PF-47, and the larger one is a PF-52.

On the TraillBlazer I use the factory specified or aftermarket equivalent filter (Purolator PL25288).
 

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'05 Chevy TB EXT
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4,051 Posts
Discussion Starter · #7 ·
I use only Castrol lubricants and AC Delco filters on anything I own.

I have not used the PF52 yet ... but it is a consideration.
 

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2004 chevy trailblazer_lt
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2,347 Posts
PF-52 at least fits the GM 3.1 and 3.8 V6 engines. Not sure what else it fits.
 

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2005 Chevy TB LT 4.2L
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43 Posts
What oil filter are you using? I know when I use the factory specified oil filter (or aftermarket) with our Oldsmobile, it takes 4.5 quarts. When I use an alternate filter (a little longer) it takes 5 quarts to hit the full mark. Just as an FYI, the factory specified filter is an ACDelco PF-47, and the larger one is a PF-52.

On the TraillBlazer I use the factory specified or aftermarket equivalent filter (Purolator PL25288).
Hey chem_man I'm confused. Are you referring to a Bravada or another model of Oldsmobile?

The ACDelco filter for the 4.2 L is PF61E or UPF61R for the Ultraguard.
 

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2004 chevy trailblazer_lt
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kanaikis619, sorry for the confusion. I was referring to our 1992 Olds 88, not a cousin Bravada.
 
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2005 Chevy TB LT 4.2L
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43 Posts
kanaikis619, sorry for the confusion. I was referring to our 1992 Olds 88, not a cousin Bravada.
Gotcha, thanks!

While we're on the subject...

I have always used Fram filters in the past. Looks like there's a wide variety of filters people use. Is ACDelco the best option here like most other parts for our TBs? Or are others comparable?

Also, any comments on whether you should always change the filter, or can you get away with changing it every other oil change if you go with an "extended life" filter?
 

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2004 chevy trailblazer_lt
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There are so many good filters on the market today it's not funny. ACDelco filters are generally held in high regard, Among some of the other well thought of "premium filters" are Wix, Baldwin, Donaldson, the PurolatorONE and PurolatorBOSS filters, NAPA Gold and Platinum filters (made by Wix) and the Fram Tough Guard and the Fram Ultra.

Some people did not like that the Fram Extra Guard filter used a cardboard looking composite material ass the ends on the filtration media as compared to other brands such as Purolator using metal ends on their standard oil filter. Others did not like paying more money for the low end Fram filter when the similar Purolator had better filtration specifications, cost less, and used metal end

Me, well, I confess, I have used various Purolator filters for the last 20+ years and have transitioned away from the "low end" white (now red) Purolator filter to the PurolatorONE and PurolatorBOSS filters. Also, I do like the Wix/NAPA filters. We just purchased a 2022 Silverado with the 5.3L V8 engine and the first filters I have purchased for it are the Wix Extreme oil filters. Why? Because I could get the top of the line Wix oil filter from Rockauto.com for less money than I could get the NAPA Gold or Platinum filters or the PurolatorONE or PurolatorBOSS filters.

Regarding how often to change an oil filter, I always change the filter each time I change the oil. I would only reuse am oil filter if I did not have an extra filter on hand (say the new filter was defective and it was my last one). I always thought of it as why add dirty oil to clean oil when the cost of an oil filter is trivial to the cost of an engine.
 
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'05 Chevy TB EXT
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Discussion Starter · #13 ·
It used to be a great filter in days past ... Autolite. Their PF-1 was top of the heap for Fords.

Their PF1A (no dash -) was a factory-installed secret-qualities filter that was impossible to buy after sales.

IIRC --- the PF-13 was a good number for GM 265/283/327/350/400 engines of the SBC variety.

But I'm reminiscent of those Autolite filters, basically, as being pretty darned good.
 

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2004 Chevy Trailblazer LT 4.2
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130 Posts
Been using 6.5 qts since new and it just touches the Full Mark with standard size ( PF - 61 ) filter

Also Rotating the dipstick prior to reading it ends the this side is lower than the other side controversy as not to read it wrong and overfill
 

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2002 chevy trailblazer_ls
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2,234 Posts
7 with filter is the spec, but in 20+ years, I've reached the Full mark with 6.5. Using ACDelco PF58 filters, I bought two cases of them back in the day for $1 per filter ea. They have the anti drainback valve. It does not use any oil between changes. I figure there's a half-quart retained in the engine no matter how long I let it drip. I always warm it up, remove the drain bolt ("plug") and let it drip a few hours too. So keeping that 1/2 quart 'til next time, I just need 6. Right now I have 5W-30 Castrol Magnatec in it.
 

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2004 gmc envoy_slt
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8 Posts
In the couple of years I've had my 05TB 4.2 EXT., I think I've changed the oil at least 4 times and it always needs that extra little bit to get it full.

This might be a dipstick anomaly --- I wonder and don't know what to think so far.
Same here 04 Envoy/original engine dipstick.
After running to operating temp, 10-15 mins to drain with vehicle level. Always takes a tad more than 7 qts to bring up to the top line.
 

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2007 chevy trailblazer_ls
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33 Posts
I buy whatever is on sale in my local autoparts store. The differences in filters isn't that great, the differences in oils and oil change periods is everything.
I've owned the TB since 2016 when it had 84K miles. I've had the oil changed at the shop exactly once. They under filled the oil because their oil change "...included only 5 quarts..."! They either didn't bother to check the oil level, or didn't bother to find out how much oil the TB took. Certainly they didn't call me to authorize another two quarts.
Since then I've changed the oil myself and only used premium synthetic oils every 5K miles.
 

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There are so many good filters on the market today it's not funny. ACDelco filters are generally held in high regard, Among some of the other well thought of "premium filters" are Wix, Baldwin, Donaldson, the PurolatorONE and PurolatorBOSS filters, NAPA Gold and Platinum filters (made by Wix) and the Fram Tough Guard and the Fram Ultra.

Some people did not like that the Fram Extra Guard filter used a cardboard looking composite material ass the ends on the filtration media as compared to other brands such as Purolator using metal ends on their standard oil filter. Others did not like paying more money for the low end Fram filter when the similar Purolator had better filtration specifications, cost less, and used metal end

Me, well, I confess, I have used various Purolator filters for the last 20+ years and have transitioned away from the "low end" white (now red) Purolator filter to the PurolatorONE and PurolatorBOSS filters. Also, I do like the Wix/NAPA filters. We just purchased a 2022 Silverado with the 5.3L V8 engine and the first filters I have purchased for it are the Wix Extreme oil filters. Why? Because I could get the top of the line Wix oil filter from Rockauto.com for less money than I could get the NAPA Gold or Platinum filters or the PurolatorONE or PurolatorBOSS filters.

Regarding how often to change an oil filter, I always change the filter each time I change the oil. I would only reuse am oil filter if I did not have an extra filter on hand (say the new filter was defective and it was my last one). I always thought of it as why add dirty oil to clean oil when the cost of an oil filter is trivial to the cost of an engine.
The rubber grip on those Fram filters has been a blessing on numerous vehicles of mine over the years. That is the only reason I prefer them over others.
 
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