What grade of gasoline should the Buick GL8 use?

[EmilyRose]

Buick GL8 requires 95-octane gasoline. The Buick GL8 is equipped with a turbocharged engine, which necessitates the use of 95-octane gasoline. For older models with naturally aspirated engines, 92-octane gasoline can be used. Turbocharged engines operate with higher temperatures and pressures inside the cylinders, so a higher-grade gasoline with better stability is required. Taking the 2021 Buick GL8 as an example, its body dimensions are: length 5238mm, width 1878mm, height 1776mm, with a wheelbase of 3088mm, a fuel tank capacity of 66 liters, and a trunk capacity of 475 liters.

[Sabrina]

I've been driving this GL8 for over five years and always fill it with 92-octane gasoline. The manufacturer's manual clearly states that it recommends 92-octane or higher unleaded gasoline, so there's absolutely no need to go for higher grades. When I first got the car, I tried using 95-octane, but found no difference in power or fuel consumption. The engine noise was slightly quieter, but it's unnoticeable during daily commutes. Now I stick to 92-octane, saving hundreds on fuel each month—enough to buy two cans of baby formula. It's best to choose reputable brands like Sinopec for refueling, as their fuel quality is more consistent. Don't be tempted by discounts at small gas stations; last time I used off-brand fuel, the engine warning light came on. Overall, the GL8 is built for regular fuel, and 92-octane is the most practical choice.

[ManuelFitz]

As a seasoned GL8 driver who frequently takes long trips, I have a lot to say about refueling. The fuel cap clearly indicates the use of 92-octane or higher gasoline, so I've been using the most basic 92-octane fuel all year round. I once tried using 95-octane for three consecutive months, and the cost per kilometer increased by six cents. Over 30,000 kilometers, that added up to more than 1,000 yuan in extra fuel costs, with no noticeable performance improvement. In fact, the difference in gasoline grades lies only in anti-knock properties. The GL8 engine's compression ratio is less than 11:1, so higher-octane fuel is completely unnecessary. If you're really concerned about fuel quality, regularly adding a bottle of legitimate fuel additive is more practical. With fuel prices so high now, filling up with 92-octane saves over 30 yuan compared to 95-octane—enough for a hot meal at a service area.

[PeterLynn]

After studying the GL8's engine specifications, I found that using 92-octane gasoline is completely sufficient. The compression ratio of 10.5 is inherently compatible with 92-octane fuel, and forcing 95-octane is just a waste. I personally tested it over 20,000 kilometers, and under the same road conditions, both 92 and 95-octane fuels gave me a fuel consumption of around 9.8 liters per 100 kilometers. When refueling, I made sure not to mix different octane ratings, as adding 95-octane when there's half a tank of 92-octane left might cause slight knocking. Now, my GL8 has reached 100,000 kilometers, and I've consistently used 92-octane gasoline from reputable gas stations without any engine issues.

[DeAaliyah]

As a budget-conscious GL8 owner, I calculate fuel expenses meticulously. With a 66-liter fuel tank, choosing 92-octane over 95-octane saves me 0.5 yuan per liter, totaling 33 yuan per fill-up. Based on 2,000 km monthly mileage, this translates to over 2,000 yuan annual savings. The manufacturer's 92-octane recommendation is justified - the ignition timing is specifically calibrated for it. When I temporarily used 95-octane on highways, fuel consumption increased by 0.3L/100km. Now I consistently use PetroChina's 92-octane, enjoying extra discounts on their 8th-day member promotions. This approach keeps both my wallet and car happy - truly the smart choice.