I see that my new L's oil cap says 5-20. Anyone had a ny problems running the Mobil One 10-30? Thanks!

 

Nope. Better to combat piston slap in the cool mornings.

 

MOP....thanks for the info! Do you run the 10-30?

 

I'm using 5w-30.

 

I think MOP may be on to something. I remember hearing years ago that Supercharged/Turbocharged engines should run a slightly thicker oil then recommended. I know the 5-20 is a joke, thats why I run 5w-30. I think 10-30 would be better for the L's. Maybe someone who's more experienced with engines can say.

 

oThe 01 L's engine, like other 2001 Ford engine specifies 5-20W ACEA A1/B1 or API SJ/CF (Ford M2C913A specification). The requirements stipulate:

1. Proper viscosity at the rated operating tempature range

2. Proper rate of flow

3. Proper lubrication within mileage spec and suspension of contaminants and combustion by-products

4. Emissions requirements

In your owners manual you will see a reccomended oil viscosity rating for temprature operating ratings. Thicker oil in the summer, thinner oil in the winter. I believe with this particular engine, the 5-20 is rated year round for all climates

By increasing the oil viscosity, logic says that you would reduce oil flow rate. What it will do in our engines is add more resistance to moving parts and the oil pump, thereby increasing power requirements at a given RPM to maintain the same flow rate, increasing emmisions, etc.

However with synthetics (full) this is not quite the case. Synthetics are more "slippery" (less resistance between oil molecules).

Point: Synthetics do not offer the same impedances as a conventional motor oil at the same weight rating.

Going to the 10-30 will give you a oil blend where the lightest parts are 10 and the heaviest are 30. Not a big enough diffrence to be bad or damaging, but 10 weight molecules can certainly soak larger jars and jolts (piston slap) than 5 can. Once your engine reaches normal operating temprature there is little difference between the flow of a synth 10-30 and a conven. 5-20. You won't feel the motor acting as if you poured honey into it.

Some purist chemists may sneer at this smattering, but the basic point is that the 10-30 (synth) will work just fine and offer better protection for this engine, IMO.

I used to own a Mitusbishi Starion Turbo (Dodge Conquest, same car) where 10-40 was reccomended but I went with the 20-50 because it would keep the turbo bushings nice and pretty for a lot more runs...