CadillacXLR2008Overview/cadillac/xlr/2008/base/

2008 Cadillac XLR

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 XLR.

Body PASSENGER CARTransmission Automatic (S6)

The 2008 Cadillac XLR is a passenger car specified for an 8-quart fill of 5W-30 API oil, paired with a six-speed automatic (S6) transmission and EPA fuel economy ratings of 15/24/18 mpg. Reliability records show only three owner complaints for this model year—with the power train and fuel/propulsion system identified as the top complaint area—alongside a single recall. This complaint volume places the 2008 model near the most reliable end of the 2004-2009 production span, representing a significant reduction from the 34 issues logged for 2004 and sitting just above the single complaint recorded for 2009.

Model year200920082007200620052004

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity8 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
EPA fuel economy15/24/18 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 85 · 590 CCA battery, OE oil filter 12731179. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 85 · 590 CCAOEM · verified

OE service part numbers OEM · verified

Engine oil filter12731179 alt 12684038
Engine air filter19166106 alt 10342024
Spark plug12592619 alt 12571535
Battery88866261
Front wiper blades19388169
Serpentine belt12578061 alt 12599847
Thermostat12601556 alt 12559807
Cabin air filter22862632 alt 15861929

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S6)

Dimensions & weight NHTSA vPIC

Overall length177.6 in
Overall width72.4 in
Overall height50.4 in
Wheelbase105.9 in
Curb weight3646 lb
Track (front / rear)62.2 / 62.2 in
Weight distribution (front / rear)49/51

Ratings & economy EPA / vPIC

EPA city / highway / combined15 / 24 / 18 mpg
DrivetrainRear-Wheel Drive
Recommended fuelPremium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the XLR of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

5.8–6.5 sec0–60 mph (tested)quickest 5.80 sec — 2004 Roadster
YearTrim / engine0–60¼ mileHPDrivetrain
2004Roadster 4.6L V85.80 sec14.20 sec320 hpRWD
2004Roadster 4.6L V85.80 sec14.10 sec320 hpRWD
2004Roadster 4.6L V85.90 sec14.40 sec320 hpRWD
2004Roadster 4.6L V86.00 sec14.15 sec320 hpRWD
2004Roadster 4.6L V86.50 sec14.80 sec320 hpRWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 8 qt of 5W-30 API engine oil, 75W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs, the oil drain plug to 15.0 ft-lbs. The firing order is 1-2-7-3-4-5-6-8.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity6.7
Brake FluidDOT 3
Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity3.5 qt
Engine CoolantDEX-COOL OR EQUIVALENT
Engine Oil5W-30 · API
Engine Oil Capacity8 qt

Engine torques

Intake Manifold to Engine BoltsSupercharger: 18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts18 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts18 ft-lbs
Engine Oil Pan Drain Plug15.0 ft-lbs
Engine Oil Pan Drain Plug15.0 ft-lbs
Engine Valve Cover Bolts7.4 ft-lbs
Engine Valve Cover Bolts8.0 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs
Rear Wheel Hub151 ft-lbs

Ignition

Cylinder Firing Order1-2-7-3-4-5-6-8
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.040 in
Spark Plug Torque11.0 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.050 in
Spark Plug Torque11.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.10 lbs
Oil GroupPAG
Oil Type46
Oil Capacity5.00 oz
Standard BCI Group Number85
Standard BCI Cranking Performance590 cca
Standard BCI Group Number85

Service checks

Pressure Test15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief18 psi
Thermostat Opening Temperature188-206 °F
Key ON Engine OFF (KOEO)55-62
Injector Primary Resistance11-14 @ 50-90 degreesF ohms

Brakes

Torque Caliper to Bracket23 ft-lbs
Torque to Knuckle125 ft-lbs
Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation0.001 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.26 in / 1.024 in
Rotor Nominal Thickness To1.26 in / 1.024 in
Rotor Minimum Machining1.205 in / 0.98 in

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
137 ft. lbs., step 2: 15037 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 25,000 miCabin Air Filter (replace)
Every 50,000 miEngine Air Filter Element (replace) · Fuel System (inspect)
Every 100,000 miExhaust System (Complete) (inspect) · Spark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill) · Intercooler (drain & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2008 Cadillac XLR sits near the tail end of a generation that saw a dramatic decline in federal complaints, from 34 in 2004 to just 3 in 2008, with recalls similarly stabilizing at one per year from 2006 onward after starting at five in 2004. Notably, NHTSA investigations dropped to zero after 2005 and remained there through 2008, suggesting the most significant regulatory concerns were resolved early in the production run. The 2008 model's three complaints are spread across power train/fuel propulsion, exterior lighting, and an electrical/latches/locks/ESC cluster, with one crash-related complaint and zero fire complaints; the data does not specify root causes for any of these. While complaints remained low, TSBs climbed steadily every year — reaching 910 in 2008 — indicating GM continued identifying and documenting service refinements, meaning a well-maintained 2008 likely benefits from accumulated dealer knowledge. Compared to the 2007 model's two complaints, 2008's three is a negligible uptick and still represents one of the generation's quietest years. On balance, the 2008 XLR is a sound choice within this generation, offering the lowest-risk combination of minimal complaints, stable recalls, and extensive technical service coverage.

1
Open recalls
NHTSA campaigns
910
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
3
Owner complaints
1 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 3 complaints on record, top 3 components.

Power Train,Fuel/Propulsion System1
Exterior Lighting1
Electrical System,Latches/Locks/Linkages,Electronic Stability Control (Esc)1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

11E009000Fuel System, Gasoline:Delivery:Fuel PumpReported 28/02/2011

TI AUTOMOTIVE IS RECALLING CERTAIN FUEL PUMPS, PART NUMBERS TU456 AND TU303, SOLD UNDER VARIOUS BRAND NAMES AS AFTERMARKET AND REPLACEMENT EQUIPMENT FOR THE MOTOR VEHICLES LISTED ABOVE. THE DEFECTIVE FUEL PUMP MAY… Remedy: TI AUTOMOTIVE WILL NOTIFY OWNERS OF RECORD AND WILL REPLACE ANY DEFECTIVE FUEL PUMP WITH A NEW OR REWORKED FUEL PUMP FREE OF CHARGE. THE SAFETY RECALL BEGAN ON FEBRUARY 22, 2011…

Technical service bulletins NHTSA · verified

Showing 5 of 910 bulletins on record with NHTSA.

BulletinDateComponentSummary
135982025-09-09Unknown Or OtherNew Vehicle Monitoring Programs Section in IVH
PIC5650M2025-08-06Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIP5601C2025-07-18Unknown Or OtherThis PI communicates the requirement to provide a pico file to receive diagnostic…
PIT5074R2025-05-30Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIT5074R2025-05-30Unknown Or OtherThis Preliminary Information communication provides information to the technician about…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific XLR. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2008 XLR take?

8 qt of 5W-30 API, per the factory manual.

Does the 2008 XLR have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the XLR get?

EPA figures are 15 city / 24 highway / 18 combined mpg.