- Mercury Grand marquis
- 225/45 R17
- 40,000 miles
Excellent, great handling tough tires and very solid sidewalls. Good for 50000 miles for sure , superior to the firestone le3,s for example. Good all around tire.
The Westlake SL369 is a budget on-road all-terrain tire with good wet braking, handling and aquaplaning resistance in its single independent test. Ride comfort, subjective noise, snow traction and dirt-road feel are its main compromises.
Built from every independent test result and vetted owner review we hold for this tire - the evidence is all further down the page. Data updated October 2026.
The BEST All Terrain Tires for 2026 Tested and Rated P4 of 7
The Westlake SL369 was one of the surprises of the test. I used it as a reference tire in wet handling and it performed very well, finishing near the front in wet braking, wet handling and straight aquaplaning. It also produced a low measured noise result, even though subjectively it was the noisiest and least comfortable tire in the group. The trade-off was clear away from wet tarmac: snow traction was weak, subjective snow handling was down the order, and it lacked the dirt support and purchase of the better all-terrain tires. It suits road-biased drivers wanting strong wet grip, but not those prioritising comfort or serious off-road feel.
| Year | Test | Result | Award |
|---|---|---|---|
| 2026 | The BEST All Terrain Tires for 2026 Tested and RatedTire Reviews · 265/70 R17 | P4 / 7 | Tested by Tire Reviews |
I Tested 8 Of the BEST All Terrain Tires in the Dry, Wet, Snow and Dirt!
In 265/70 R17, the Westlake SL369 is projected to cost $23.07 per 1,000 miles to buy and run - about $577 over 25,000 miles - based on its US price and the manufacturer's treadwear warranty, from the The BEST All Terrain Tires for 2026 Tested and Rated.
Size Range25 sizes available
31-315Width10-85Profile14-20Rim84-127 Q-TLoad/
EU LabelAcross 25 sizes - the grade depends on the size you buy.
Fuel
Wet
Noise
70-72dB B
What owners say
Across 3 owner ratings the Westlake SL369 averages 81%. Owners rate Dry Grip highest at 8.7 out of 10 and Ice Grip lowest at 6.7. 1 of those reviews come from owners past 10,000 miles.
Owner ratings averaged from 3 ratings
Excellent, great handling tough tires and very solid sidewalls. Good for 50000 miles for sure , superior to the firestone le3,s for example. Good all around tire.
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