What Type of Oil Should Be Used for a Horizontally Opposed Engine?
3 Answers
Horizontally opposed engines should use fully synthetic oil. The characteristics of fully synthetic oil are: 1. It has excellent high and low-temperature performance and flow properties; 2. It has a longer oil change interval; 3. It is suitable for more severe driving conditions and can fully protect the engine. Engine oil, also known as motor lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption and cushioning. The method for changing engine oil is: 1. Start the vehicle engine to warm it up; 2. Unscrew the oil drain bolt; 3. Remove the oil filter; 4. Apply new oil to the gasket of the new oil filter; 5. Pour the new oil into the oil pan; 6. Check for leaks under the engine and use the dipstick to verify the oil level before starting the engine for testing.
As someone who frequently tinkers with engines, I'm quite familiar with oil selection for horizontally opposed engines. This design positions the pistons horizontally, unlike traditional vertically oriented engines where gravity can cause uneven oil pumping by the oil pump during cold starts or turns, making full synthetic oil a must. Recommended viscosities like 5W-30 formulations are ideal as they flow quickly, reducing initial wear. When choosing a brand, look for API SN or SP certification to ensure high-temperature protection. Personally, I use the Mobil 1 series with excellent results—it prevents carbon buildup and oil passage clogging. Don't forget, horizontally opposed engines tend to have higher oil consumption, so regular oil level checks are crucial; I change the oil every 5,000 kilometers or so, paired with a new oil filter to keep the system running smoothly. Neglecting these details could lead to piston ring damage, resulting in costly and troublesome repairs.
I've owned a Subaru for several years and can't be careless when choosing engine oil. The horizontally opposed engine has pistons placed sideways, and conventional mineral oil starts slowly in cold weather, leading to insufficient lubrication and easy wear. I always opt for full synthetic oil, like the 5W-30 low-viscosity type, which flows quickly and provides thorough protection, reducing noise. Cost-wise, a good barrel of oil is much cheaper than repairs; I use brands like Castrol or Pennzoil, which are moderately priced but durable. Driving habits also influence the choice: during highway driving or city traffic jams, the oil is prone to oxidation and degradation, so it's necessary to change it every 7,500 kilometers. Additionally, regularly checking the dipstick and topping up the oil level when it drops has saved me a lot on repair costs.
