Should the old Excelle use 5w30 or 5w40?
4 Answers
The old Excelle uses 5w30. The functions of engine oil are: 1. To alleviate friction and high temperatures; 2. To reduce gas leakage and prevent external pollutants; 3. To prevent contact between water, air, acidic harmful gases, and parts; 4. To buffer the pressure rise at the engine cylinder port; 5. To flush away dirt generated on the working surfaces of parts. Taking the Excelle 2004 1.6L manual comfort version as an example, its length, width, and height are 4515 mm, 1725 mm, and 1445 mm respectively, with a wheelbase of 2600 mm, and the body structure is a 4-door 5-seater sedan. In terms of power, it is equipped with a 1.6L naturally aspirated engine, paired with a 5-speed manual transmission.
I remember when I drove the old Buick Excelle, I often discussed engine oil choices with fellow car owners. The 5W30 has lower viscosity, starts up quickly in cold weather, offers noticeable fuel economy benefits, and feels smoother on long drives. However, older engines with wear and tear, especially during summer highway driving or climbing hills, benefit more from the high-temperature protection of 5W40, preventing unusual noises and increased fuel consumption. I switched to 5W40 after my car hit 100,000 kilometers and noticed the engine ran quieter with better protection. Still, it's best to check the owner's manual—usually, 5W30 is recommended, but adjustments should be made based on climate and driving habits. In hotter southern regions, 5W40 provides more peace of mind, and don’t forget regular oil changes and air filter checks.
As someone who frequently maintains my own car, I've tried two types of engine oil on my old Buick Excelle. The 5W30 works well for daily driving, offering about 0.5% better fuel efficiency and smooth cold starts. However, older engines with larger clearances may require higher viscosity as they wear. Using a viscometer, I found that 5W40 maintains stability at high temperatures, especially reducing metal friction during prolonged driving. My advice is to first check the manual's recommendation, then decide based on your car's condition. If the engine has slight noise or low oil pressure, switching to 5W40 can enhance protection. Also consider regional temperatures – cooler northern areas might find 5W30 sufficient and more cost-effective.
At my age, I've driven several old Excelle models. The manual generally recommends 5W30 for fuel efficiency and environmental considerations. However, as the car ages, the engine isn't as precise as when it was new. Switching to higher viscosity 5W40 can better cushion wear and reduce oil leakage risks. During summer traffic jams when temperatures rise, 5W40 provides superior protection. I recommend checking the dipstick to monitor oil consumption. Using cheaper 5W30 in older cars is acceptable, but if you notice increased engine noise, upgrading to 5W40 is a reliable choice that also lowers maintenance costs.
