I think the below mentioned information may help us deducing the result of all the conversion
WHAT TO LOOK FOR ON A MOTOR OIL LABEL
The round symbol label is referred to as the "API DONUT". It gives you three pieces of information. API (American Petroleum Institute) Service Rating - this two letter classification identifies the vehicle fuel type and quality level of the motor oil. The first letter indicates the vehicle fuel type that the oil is designed for. Ratings that begin with an "S" are intended for gasoline engines. Ratings that begin with a "C" are for diesel engines. The second letter designates the quality level of the motor oil. The higher the letter, the more advanced the oil and the more protection it offers your engine. An SJ oil can be used in any engine requiring an SB, SG, SH, etc. oil.
SAE (Society of Automotive Engineers) Viscosity Grade. Viscosity is a measure of an oil's thickness, or resistance to flow. Lower numbers indicate thinner oil and higher numbers indicate thicker oil.
There are two types of motor oils, single grade and multigrade. Multigrade oils such as a 10W-30, are designed to have the viscosity of an SAE 10W oil at cold temperatures combined with the viscosity of an SAE 30 oil at engine operating temperatures. The "W" or "Winter designation indicates that the oil meets viscosity requirements for low temperatures (below 30°F).
RATING, ENGINE, TYPE DESCRIPTION
SJ Gasoline engines in passenger cars and light duty trucks beginning with 1997 models. Oil designed for this service level provides greater fuel economy, lower volatility and lower phosphorous limits over the previous SH category.
SB Minimum Duty Gasoline Service. For engines operating under conditions mild enough to require only minimum protection. Non-detergent oil. Should not be used in an engine unless specifically recommended by the equipment manufacturer.
CF, CF-2 Off-road indirect injected diesel engines and two-stroke diesel engines. Provides effective control of piston deposits, wear and bearing corrosion in a broad range of fuel types often found in off-road applications. Provides effective control over cylinder and ring-face scuffing and deposits in two-stroke cycle engines.
Be sure to check your owners manual to make the correct viscosity choice.
RATING, COLD STARTINGTEMP.CONDITIONS, DESCRIPTION
5W-30 -25 degrees C Provides excellent fuel economy and low temperature performance in most late model automobiles. Recommended for non-turbocharged engines. Especially recommended for new cars.
10W-30 -20 degrees C Most frequently recommended viscosity grade for most automobile engines, including high performance multi-valve engines and turbo-charged engines.
10W-40 -20 degrees C The first multigrade introduced. A good choice for controlling engine wear and preventing oil breakdown from oxidation. Note: Always check your owner's manual or warranty requirements before using this grade.
20W-50 -10 degrees C Provides maximum protection for high performance, high RPM racing engines. Excellent choice for high temperatures and heavy loads such as driving in the desert or towing a trailer at high speeds or long periods of time.
SAE 30 -5 degrees C For cars and light trucks, where recommended by manufacturers.
SAE 40 0 degrees C Not recommended when cold temperature starting is required.
