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“Resource Conserving” oil is a designation for engine oils that, in addition to meeting standard engine protection requirements, also demonstrate fuel economy improvements.
These oils are designed for gasoline-engine cars, vans, and light trucks and are part of the API (American Petroleum Institute) engine oil certification system. They are often identified with the API Certification Mark, also known as the “Starburst,” and carry the “Resource Conserving” designation in conjunction with other API service classifications.
Here’s a more detailed breakdown:
Fuel Economy:
Resource Conserving oils are formulated to reduce engine friction, which contributes to improved fuel economy.
API Certification:
The API Certification Mark ensures that the oil meets current engine protection standards and fuel economy requirements, according to Olipes.
Engine Compatibility:
These oils are generally recommended for use in modern gasoline engines, including those with direct injection and turbocharging, according to Ravenol.
Designation:
Resource Conserving oils are often identified by a specific API service classification (e.g., API SP, says API) and the “Resource Conserving” designation in the API Service Symbol, according to API.
Benefits:
Widespread use of Resource Conserving oils can contribute to overall fuel savings for a vehicle fleet.
Fleet Oil Change Cost Calculator
| API Certified | Resource Conserving | |
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| Oil Cost per Quart ($): | ||
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| Estimated Fuel Efficiency Gain: | ||
Maintenance Insight: Synthetic oil requires fewer changes per year, reducing not only material cost but also labor time, shop scheduling, and vehicle downtime.
Fuel Efficiency Insight: Even small improvements in fuel efficiency from synthetic oil and better engine cleanliness can result in measurable savings, especially across multiple vehicles.
Environmental Insight: By switching to synthetic oil, the reduced number of oil changes and improved fuel efficiency contribute to lower CO₂ emissions per vehicle and across the fleet. CO₂ emissions avoided are calculated based on an average of vehicle-specific values per gallon of gasoline burned, adjusted by the reduction in fuel usage.
Why does Honda specifically state in the owner’s manual NOT to use “Resource Conserving” motor oil?
The former supplemental category, which was called Energy Conserving required only fuel saving properties from the oil. Resource Conserving requires further properties like:
– Emission system protection
– Turbocharger protection
– Compatibility with engines operating on ethanol containing fuels, up to E-85.
What exactly about “Resource Conserving” scares OEMs enough to include the cautionary statements in the owner’s manual against it? School me please, legitimately just trying to learn here. This engine seems to be as close to a “normal” car engine as it gets, compared to its air-cooled rivals. Yet I haven’t seen many cars caution against “Resource Conserving” oils, quite the opposite actually.