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2005 Buick LaCrosse CXL 3800 Series III Miles on Engine: 187094 Miles on Oil: 3999 Out: Quaker State 10w30 HM Full Synthetic In: Quaker State 10w30 HM FS Filter out: AC Delco PF47E Filter In: AC Delco PF47E OLM was at 66 percent but I am old-fashioned and change around 4k, plus we are...

2005 Buick LaCrosse CXL 3800 Series III Miles on Engine: 183095 Miles on Oil: 3733 Out: Quaker State 10w30 HM Full Synthetic In: Quaker State 10w30 HM FS Filter out: AC Delco PF47E Filter In: AC Delco PF47E

Buick LaCrosse 2005 CXL 3800 Series III V6 Miles on engine 178364 Miles on oil 5467 Out: Pennzoil Platinum 5w30 Pennzoil filter In: Quaker State 10w30 HM Full Synthetic AC Delco PF47E filter This was the longest I've gone on an oil change with this vehicle. That wasn't intentional; I had to...

2005 Buick LaCrosse CXL 3800 V6 Series III Out Frankenblend 3 qts Pennzoil Platinum Euro L 5w30 2 qts Pennzoil Full Synthetic HM 5w30 Out ACDelco filter In Pennzoil Platinum 5w30 In Pennzoil filter Miles on Oil 4512 Miles on car 173897 This is my first run with the "new" Platinum that can...

Buick LaCrosse 2005 3800 Series 3 v6 Total miles on engine 169385 Total miles on oil 4291 Out: Quaker State 5w30 Full Synthetic High Mileage SP In: Frankenblend 3 qts Pennzoil Platinum Euro L 5w30 2 qts Pennzoil Full Synthetic HM 5w30 The 3 Euros were snagged on Wal Mart sale...

Previous fills are, in chronological order STP Full Synthetic 5w30 Pennzoil Platinum 5w30 Frankenblend of various 5w30s, all Pennzoil or Quaker State.

Yeah the spec is 5w30, but I ran a 10w30 during the summer because why not? :)

Vehicle: 2005 Buick LaCrosse CXL Engine: Buick 3800 Series III V6 Miles on Engine: 165,090 Miles on Oil: 4118 Oil Type: Pennzoil Platinum High Mileage 10w30. Ran 10w30 for the summer months. Viscosity was a little higher than the 5w30s that I have been using, although as Blackstone notes, it...

2005 Buick LaCrosse CXL 3800 Series III Mileage: 165090 Miles on Oil: 4118 Out: Pennzoil Platinum HM 10w30 ACDelco PF47E Used .5 quarts since last change In: Quaker State Full Synthetic HM 5w30 ACDelco PF47E

Thank you for all the information everyone

It's not a new engine. Almost 14 years old.

The last oil change was back in March.

OOPS. Fixed

Here is the latest UOA for my wife's 2010 Ford Escape with 2.5L I-4. The oil was Pennzoil Platinum High Mileage 5w-20. It required no top-up oil this run. For the last two oil changes, the OLM has been extremely conservative, asking for new oil at about 2000 miles. In the past, it would not...

2010 Ford Escape XLT 2.5 I4 OUT: Pennzoil Platinum High Mileage 5W-20, Pennzoil PZ21 filter IN: Quaker State High Mileage Full Synthetic 5w-20, Motorcraft 910S filter. Mileage on vehicle: 200770 Miles since change: 1963 Time since change: six months Short mileage but lots of short trips in...

One jug of Quaker State Full Synthetic High Mileage 5w20 from WalMart for my wife's 2010 Ford Escape, to be used this coming week. One jug of Quaker State Full Synthetic High Mileage 5w30 for my 2005 Buick LaCrosse, to be used sometime in late November or early December when the next change is due.

How many miles on what I assume is a 3800 Series 2?

Previous owner did the gasket job and installed the metal coolant elbows, so the major design flaws with this engine have been dealt with. However, I am still paranoid and monitor the coolant levels closely. As for the transmission, I know it was properly serviced by one of the previous owners...

True. The Euro L has almost no moly and low magnesium, but that was balanced by the higher levels of those additives in the QSFS. So those two cancelled each other out and since the PP and PPHM are very similar to each other, we end up with a frankenblend that looks very much like PP. Which is...

I've owned this car for a year now. Engine is very sound. The rest of the car has the normal issues you'd expect from an 18 year old vehicle. I need another 5 years out of this car and I don't doubt the 3800 engine will make it...we will see about the transmission and the rest of the car, 😆