General Motors Cadillac (2008)
Estimated running costs and MOT pass rates from 67 MOT tests in 2024.
Annual Cost
£3,303
£275/month
MOT Pass Rate
73%
Average
Road Tax
£790
Estimated/year
Est. Insurance
Grp 35-50
3564cc Petrol
Check Carefully
73% pass rate, £3,303/year to run. 9 points below average.
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Annual Running Costs
~30 mpg
Estimated CO2 band
Higher estimate due to low pass rate
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.
Reliability Verdict
Average reliability. Expect some repairs as it ages. That's 9 points below the average of 82% across all models in our data. It falls below the General Motors brand average of 90%.
73% of MOT tests on General Motors Cadillacs from 2008 ended in a pass in 2024, when they were about 16 years old. That's based on 67 tests across the UK, retests included. The average mileage recorded at those tests was 101,097 miles.
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How Does It Compare?
Mileage Analysis
101,097
Average miles
118,400
Expected for age
The average 2008 General Motors Cadillac had 101,097 miles on the clock at its 2024 MOT, which is in line with the expected 118,400 miles for a 16-year-old car, suggesting normal everyday use.
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About the 2008 General Motors Cadillac
The 2008 General Motors Cadillac is a large-engined car. Our records list a 3564cc petrol engine, though engines vary between versions. 67 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. Among all models from 2008, the average MOT pass rate is 73%, and this model matches that benchmark.
With an average of 101,097 miles recorded at its 2024 MOT tests, General Motors Cadillac owners drive about as much as the UK average.
2008 General Motors Cadillac Fuel Costs
The 3564cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2008 General Motors Cadillac?
Total estimated annual running cost is £3,303 (£275/month), broken down as £1,958 fuel, £790 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 73% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2008 General Motors Cadillac
At 18 years old, the General Motors Cadillac is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. Note: with only 67 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
Timing Chain / Belt
Watch outAt 18 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Clutch Wear
Watch outWith an average of 101k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.
Brake Discs and Pads
Medium riskHigh-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2008 General Motors Cadillac stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| General Motors Cadillac(2008) | 73% | £1,958 | £790 | Grp 35-50 | £3,303 |
| Land Rover Freelander(2007) | 75% | £1,958 | £790 | Grp 35-50 | £3,303same |
| Mercedes E(2010) | 80% | £1,958 | £790 | Grp 35-50 | £3,153-£150 |
| Mercedes CLC(2009) | 73% | £1,958 | £790 | Grp 35-50 | £3,303same |
| Porsche 911(2006) | 90% | £1,958 | £790 | Grp 35-50 | £3,003-£300 |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2008 General Motors Cadillac
Is the 2008 General Motors Cadillac reliable?
Average reliability. Expect some repairs as it ages. 73% of MOT tests on 2008 General Motors Cadillacs ended in a pass, from 67 tests (DVSA MOT data for tests in 2024, retests included). That's 9 points below the average of 82% across all models in the same data.
How much does a 2008 General Motors Cadillac cost to run?
Our estimate is £3,303 a year (£275 a month): £1,958 fuel, £790 road tax, £55 MOT and £500 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2008 General Motors Cadillac?
73% of 67 MOT tests on the 2008 General Motors Cadillac ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 360th of 566 models first registered in 2008 (bottom half).
What is the average mileage for a 2008 General Motors Cadillac?
The average mileage recorded at MOT tests on the 2008 General Motors Cadillac is 101,097 miles, which is in line with the expected 118,400 miles for a 16-year-old car, suggesting normal everyday use.
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