Hello all.
I saw a video on youtube today about the "10 most reliable engines running beyond 300,000 miles" and the 3800 V6 made it onto the list, of course. After watching this video, I did a quick google search to see if I could find the highest mileage 3800 on the road still....with most of what I saw being in the 200k range.
So, with that being said, what's the highest mileage you've ever heard of with the 3800 V6? The video said one was able to reach 565,000 miles or something like that.
Highest mileage 3800?
- luke_dubs
- GXP Member

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- Year and Trim: 2013 Regal GS
- Location: OH
Highest mileage 3800?

'02 Pontiac Bonneville SE 108,539 miles, N/A, SSEi exhaust system, boat roller mount. Gone, but not forgotten.
'13 Buick Regal GS 122k miles, 270 hp, 295 lb/ft, ZZP intake.
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- MattStrike
- Certified Bonneville Nut

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'04 Dirtymax
'97 Camaro
'92 Trofeo - Location: SE Michigan
Re: Highest mileage 3800?
The motor in my '93 came from a '98 SSEi that had 310k on it, and I put another 40k on it before needing a rebuild (which was caused by me anyway). My '92 is also over 300k.
It's fairly common to find these cars in the salvage yards well over 200k miles, usually it's either a transmission issue or frame rot (for those in the salt belt) that kills these cars off prematurely.
It's fairly common to find these cars in the salvage yards well over 200k miles, usually it's either a transmission issue or frame rot (for those in the salt belt) that kills these cars off prematurely.
Boost addict

The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax
Current project:
Something cool, trust me.
Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre
Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap
RIP:
'86 LeSabre - pictures
'93 SE - L67

The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax
Current project:
Something cool, trust me.
Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre
Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap
RIP:
'86 LeSabre - pictures
'93 SE - L67
-
dougtoth
- Posts like an LN3

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- Year and Trim: 2005SLE CRIMSON
2005SLE PEARL
1975 MONTE CARLO - Location: MUSKEGO,WISCONSIN
Re: Highest mileage 3800?
My brother in law's 2001 SLE has 354,000 miles.
Motor has never been touched.
Transmission was rebuilt at 99,000.
Motor has never been touched.
Transmission was rebuilt at 99,000.
- J Wikoff
- Administrator

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- Year and Trim: 1992 SSE
2009 G8 GT - Location: Central Illinois
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Re: Highest mileage 3800?
We have a 92 sitting out on the farm with over 400k.

WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
- SSEiMan01
- Certified Bonneville Nut

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92 SSE
92 Lumina Z34
99 Tahoe
03 PAU - Location: DeKalb, IL
Re: Highest mileage 3800?
Most of the 3800s I've had have been over 150k, the lowest was my 01 (44k when purhcased sold with 87k) and my highest was 255k on my red 96 SSEi. Next runner up was the Olds 88 at 216k, I kept that engine for racekar things... My Ultra is just about 10k shy of 200k, and I intend to double that car's mileage before it leaves my possession.
Will
91 Riviera | S2 L67 Swap/4T60E | 127K mi | Antelope Met. w/ Tan Int. | Saved From Death By Crusher
92 Bonneville SSE | L67/4T60E | 77K mi | Med Slate Grey w/ Two-Tone Grey Int. | Low Miles Time Capsule
92 Lumina Z34 | LQ1/4T60E | 177k mi | Torch Red w/Grey Int. | Rusty In Odd Spots
99 Tahoe LT | L31/4L65E | 276k mi | Spiral Grey Metallic w/Grey Int. | Truck for Truck Things and Portable Concert Hall
02 Bonneville SSEi | 171k mi | Black w/Neutral Int. | Backup and road trip car
03 Park Avenue Ultra | 212K mi | White Diamond Met. w/ Shale Int. | Southern Time Capsule
05 Acura RL | 165K mi | Carbon Grey Pearl w/Ebony Int. | The Super-Hooptie Daily
91 Riviera | S2 L67 Swap/4T60E | 127K mi | Antelope Met. w/ Tan Int. | Saved From Death By Crusher
92 Bonneville SSE | L67/4T60E | 77K mi | Med Slate Grey w/ Two-Tone Grey Int. | Low Miles Time Capsule
92 Lumina Z34 | LQ1/4T60E | 177k mi | Torch Red w/Grey Int. | Rusty In Odd Spots
99 Tahoe LT | L31/4L65E | 276k mi | Spiral Grey Metallic w/Grey Int. | Truck for Truck Things and Portable Concert Hall
02 Bonneville SSEi | 171k mi | Black w/Neutral Int. | Backup and road trip car
03 Park Avenue Ultra | 212K mi | White Diamond Met. w/ Shale Int. | Southern Time Capsule
05 Acura RL | 165K mi | Carbon Grey Pearl w/Ebony Int. | The Super-Hooptie Daily
James May wrote:Hello.
- RJolly87
- Certified Bonneville Nut

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1994 Buick Regal Custom - Location: Las Cruces, NM
Re: Highest mileage 3800?
If treated nice, 300k isn't irregular. As mentioned, usually either the transmission or rust kills them, or an unfortunate UIM/LIM gasket failure that goes undetected and leaves the crankshaft swimming in an ocean of coolant.
I looked at Copart, and there was literally 10 3800's near or above 300k miles, nearly all of which had crash damage, which means it was in operation at the time in order to be crashed.
I looked at Copart, and there was literally 10 3800's near or above 300k miles, nearly all of which had crash damage, which means it was in operation at the time in order to be crashed.
~Randall~


1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place


1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place

