The 2018 Honda Accord requires full synthetic 0W-20 oil, so you don't have a choice between synthetic and conventional. Your manufacturer specifically designed this engine to run on synthetic.
Here's what you need to know:
Cost Comparison
Full synthetic oil changes run $65 to $125 per service, including parts and labor at a dealership. A bottle of synthetic oil alone costs $24 to $42. This is higher than conventional oil at $30 to $75 total, but the price difference narrows when you factor in longer service intervals.
Why Your Accord Needs Synthetic
Honda engineered modern Accord engines around synthetic oil's superior protection. Synthetic oil provides:
- Better engine lubrication and reduced wear
- Higher viscosity index for consistent performance
- Greater resistance to thermal breakdown
- Less sludge buildup inside your engine
- Maintained fuel economy over time
These benefits keep your engine running closer to new condition longer, which protects your investment.
The Real Money Question
Synthetic lasts significantly longer than conventional. While Honda recommends checking your oil regularly, synthetic typically goes 7,500 to 10,000 miles between changes compared to 3,000 to 5,000 miles for conventional. This means fewer oil changes per year, which offsets the higher per-service cost.
On a 2018 Accord driven 12,000 miles yearly, you'd need roughly 1.5 synthetic changes annually versus 3 conventional changes. That's 2 fewer services per year, saving you $130 to $250 in labor and parts.
Warranty Protection
Using Honda-recommended full synthetic oil protects your powertrain warranty. If you skip synthetic and use conventional, you risk voiding coverage on engine damage.
Bottom Line
Synthetic is worth the cost because it's required for your vehicle, not optional. Your engine performs best with it, you change it less often, and you maintain warranty protection. The higher price per service gets offset by longer intervals between changes.