idleair 8n

whats the thoughts here boys?

Always adjust yer side-pointing idlemix for fastest idle, NOT SMOOTHEST idle, fastest idle. Understand??? Yeah, its hard with outta tach (proofmeter) but try. You can also adjust for maximum engine manifold vacuum iff'n have a vacuum gauge. The OEM manifold had a "vacuum-port", new ones don't.

And yeah, side-pointing idlemix is usually about 1/4-turn for fastest idle..... ...Dell

quite honestly, the castrol website has no pds information of 10w40 other than viscosity@100C= 14.2. thats it...nothing at 40C, pour point, ash, zinc or hths at 150C.
I know their sae 40 gives 14 at 100C and 3.7 at 150C. but that is about it.
comparing their sae 30 to sae 40 and 10w40...it seems the latter two (10w40&sae40) are superior to the sae 30 at 100C. what i care about is operating temperate viscosity, right?
now compare the castrol 10w40 or sae 40 to rotella 40 and they are about even, except i have no data for castrol's ash and zinc and 40C viscosity.
i am not sure at this point if rotella 15w40 is any better than castrol sae 40, 10w40 or rotella sae 40. this is all for summer use now.
any ideas?

And simply put, enny multi-vis is essentially the LOW number as basic viscosity. 10-30wt oil is 10wt oil with viscosity modifiers. 15-40wt rotella is 15wt oil. Understand the concept???

As fer yer 'futtzin" with yer side-pointing idlemix. Much to the dismay of environmental bureaucrats, every engine carburetor's adjustment is DIFFERENT. Yours may be 3/8-turn, mine happened to be 1/4-turn last time but could be 1/8-turn the next time. Understand that concept???

ALWAYS adjust yer carb for MAX idle rpms, NOT SMOOTHEST idle. MAX idle rpms, understand??? Then reset the behind the carb idle speed for SLOOOooow 400rpms. Do that idle adjust - idle speed adjust at least 3-times 'cuz it changes everytime you change idle speed. Understand?..... ..respectfully, Dell

ok...so the sae 40 would be a better choice over sae 30. fair enough.
so then the 15w40 theoretically should be thought of as this: its a 15 weight oil which gives start up oil pressure like a 15 weight oil but then when the oil is at operating temperature it then has the viscosity of a sae 40 oil at 100C, correct?

the advantage of the 15w40 lies in the fact of start up viscosity which is the quicker flow a 15w vs. the sae 40. am i on track?

thanks dell, i certainly appreciate it.