Its the fact that the thicker oil will "not" bleed down over night, hence
the lifters don't have to pump up in the am. All of this is in proportion to
lifter wear and engine condition in general of course. If the lifters are
badly worn and bleed down, nothing will help short of replacement of said
lifters. If they loose their oil it must be replaced. You have to consider
that the lifters are laying on there side unlike most every other design,
and this just aggravates the problem

Howard

Subject: Re: Mann Oil Filter and lifters Was:Engine Starting Problem

>>   No brand of oil filter will fix this but
>> thicker oil will reduce or eliminate the symptoms.

> How does thicker oil pump up a lifter quicker in an icy cold engine?