Compared to the petroleum -based oil I was using previously there seems to be a delay in the engine building up pressure with the synthetic I have now in the motor. Using the same viscosity oil(10-30) in both cases pressure buildup with the dyno oil was more or less instantaneous with spinning the starter-now with the Valvoline synthetic there is a delay of about 2 or so seconds.The motor is clean,relatively new, new filter,proper oil level,idle and running pressure with the synthetic is comparable with the non-synthetic oil.I hate seeing any sort of delay.I know there is some "gauge-lag" no matter what.A pre-luber would be great,no question.Has anyone else experienced this rather strange difference? The dyno oil I used in the past was Swepco(from Texas-great stuff and with pluses on the dynamometer).Could it be the filter-first time I have used a NAPA brand(which I understand is a Wix-one of the better ones)? Any comments would be appreciated Rod
I would say it might be the filter. Synthetic should flow alot easier than conventional oil. Some filters are more restrictive than others. I use the System1 reusable filter. It has a washable stainless steel mesh element. Less restriction than any paper filter. Every Buick I have ever owned has taken 2-3 seconds to build oil pressure, I wouldn't worry unless you haer noise.
Thanks Larry and Phil I was thinking it over as well before reading your very helpful posts.There can be no question that the delay is due to the filter.I found 2 Purolator filters yesterday and will change over the next day or so.I had always used the Purolator filter in the past and I swear that the oil pressure came up almost instantaneously.Much quicker than the NAPA.I bet the anti-drain back valve is somehow screwed up.Go with Purolator everyone.Too bad I have to lose a filter -full of the good Valvoline! I am getting cheap I know.Thanks again, Rod
