Originally Posted By: Shannow
Originally Posted By: kschachn
What protection might it sacrifice?
Originally Posted By: BTLew81
However, I wonder if it is TOO thin at operating temp or if it sacrifices any protection in the interest of FE.
Bloke from Ford nails it at about the 1 minute mark.
https://www.youtube.com/watch?v=-4B6Aw3Ej4o
Viscosity is deemed adequate at normal operating conditions and temperatures, then it's adequate...which it certainly is, and is certainly what Honda say about their oils/designs.
If you stay on the safe side of normal, no excursions into overheat, not prolonged loads up steep inclines on your daily commute, then there's no inadequate outcomes from an adequate viscosity.
There's nothing optimal about using an extra MPG to provide increased protection for an engine that will have the car crashed or thrown away around it.
Originally Posted By: Shannow
Originally Posted By: kschachn
What protection might it sacrifice?
Originally Posted By: BTLew81
However, I wonder if it is TOO thin at operating temp or if it sacrifices any protection in the interest of FE.
Bloke from Ford nails it at about the 1 minute mark.
https://www.youtube.com/watch?v=-4B6Aw3Ej4o
Viscosity is deemed adequate at normal operating conditions and temperatures, then it's adequate...which it certainly is, and is certainly what Honda say about their oils/designs.
If you stay on the safe side of normal, no excursions into overheat, not prolonged loads up steep inclines on your daily commute, then there's no inadequate outcomes from an adequate viscosity.
There's nothing optimal about using an extra MPG to provide increased protection for an engine that will have the car crashed or thrown away around it.
You gotta feel for this guy from Australia who has an irrational aversion to 20 grade oils. Normally he dismisses introduction to motor oil blurbs like the Motorcraft one as fluff as it is full of incorrect outdated assumptions.
When a manufacturer spec's an oil grade it is not just to deal with normal driving conditions but also the most extreme usage an owner will subject the vehicle to including taking it to the track in the case of sportier models that still spec' the 20 grade.
So run the lightest oil the manufacturer suggests with the knowledge that you'll be maximizing engine life if you maintain the car correctly including periodically checking the oil level between OCIs and topping up to the full level if necessary.