So, even though Amsoil makes a 5W-20 (which, by the way, is only a 7500 mile oil), they recommend their 5W-30 oil if you're looking for engine protection and longevity.
Honda even states in the manual that 5W-30 can be used if 5W-20 is not available (and they don't tell you to change it as soon as 5W-20 is available.....The ATF is another story....) [/B]
I remember when car manufacturer first recommended the 5W30 oil in the mid-80s,
some people at that time thought they are simply not thick enough for proper engine protection.
I later read from the Honda msg board that Honda engine might not get proper lubrication if grade 40 oil is used instead of grade 30.
Honda designed the engine to use 30 oil, so the space between engine parts are not really enough for grade 40 oil to properly
flow though to form a protective layer. The use of thicker engine oil actually shorten the life of the Honda engines.
I try to find the section in the Pilot manual saying that it is OK to use 5W30 grade oil but I can't.
Can some one tell me which page in the manual mentions "it is OK to use 5W30 when 5W20 is not available" ?
I will use 5W30 only if Honda said it is OK... but I can not find it in the temperature/oil chart in the manual.
03 Pilot EXL-RES sandstone
91 Legend coupe 5-speed