So today, I changed my oil with a Bosch oil filter, Castrol high mileage oil and some lucas heavy duty oil stabilizer and I saw a huge difference in my oil pressure! Is this normal? I was reading 15 psi at idle before and now im reading past 30! Is this normal? Is the Lucas really making that much of a difference?

Hopefully it gets rid of that typical small block Chevy puff on startup..

By the way, I have a 92 RS with an L03.

have you seen how thick Lucas is? it wont hurt anything being up that high IMO. if it was me i would use Lucas over any other product such as rislone or restore.

Sounds like we have a wonderful product!

pressure is simply the measure of RESISTANCE TO FLOW, the added LUCAS product INCREASED the VISCOSITY, making it harder to pump thru the bearing clearances, it also means that on cold days and when the engines been sitting awhile it take longer for lubricant to reach the further extent of the oil passages, you would get the same increase in pressure if you poured bacon grease, and melted cheddar cheese in the engine, that dosen,t indicate it is lubricating better only that the effectively thicker oil viscosity increased, making it harder to pump thru the bearing clearances
I have yet to see any scientific data testing showing it hurts or helps lubrication, only user testimonials , you can get
user testimonials that tell you magnets on your fuel filter ionize fuel and give better mileage that dos not mean its true
Remember the most of your engine wear happens at start-up, the longer it takes for lubricants to start flowing the more wear





http://forum.grumpysperformance.com/....php?f=54&t=52

http://forum.grumpysperformance.com/...hp?f=54&t=2187

http://forum.grumpysperformance.com/...hp?f=54&t=1334

See, that's why I always felt funny about Lucas products. Seems like it would just kill your motor on the cold start ups.

i think the only reason someone would use this is if their engine was worn to the point that tolerances were way out of spec and they had little to no pressure or were burning oil. they all look like syrup to me. but if i had to use one it would be lucas because its fully oil soluble where as bars and rislone and restore have solid additives which have been known to clog oil passages.

Im really just trying to get rid of the smoke on startups. It actually has improved it already.

theres a good chance you need new valve seals or your valve guides are worn, a leak-down test will show if its worn rings

Yeah it's most likely valve seals. I dont see how an additive could fix that.

The lube is way 2 thick to make it down the valve guilds/seals!
nothing like a lil diff lube in the oil pan!

Hydrodynamics pressure is resistance to flow
so higher viscosity more resistance = higher pressure

So should I not be using it? The motor runs mint for 134k.

Also, doesnt lucas help the oil "stick" and help prevent the motor from being dry on startup?

higher pressure and viscosity is better for an older engine the looser your engine gets the larger the gaps the oil needs to fill

race engines run some thick stuff and at high pressure so they can run the engine as loose as possible theory is a loose engine is less friction and more power

i used rislone compression restore in my monte carlo Z34 for 3 oil changes after i bought the car 3 years and 30,000 miles ago. the motor was smoking thick clouds of blue all the time. now the exhaust is clean and clear. no motor trouble and with 186,000 miles it still runs like new and i haven't used a bottle for 2 years and 20,000 miles i would recommend using the product if you don't feel like doing any significant mods to the car
the only thing i've heard negatively about lucas is that it tends to lose viscosity at and boil at high temps like around 240 to 260. and to never let your motor run hot on it. i don't know how much of that is true . does anyone else have any specs on lucas?

Running some synthetic will go a lot farther to that effect than Lucas would I imagine. Synthetic is excellent for cold start protection for various reasons.

Back in the early seventies we used STP (thick stuff) as an assembly lube cause it stuck to the bearings, cam lobes, rings, and cylinder walls so it wouldn't start dry. If lucus stays, and doesn't drain away, the theory is after sitting awhile there wouldn't be as dry of a start as there would be if just oil left on the bearing surfaces.

I run 10w30 with some lucas and never seen my oil pressure drop below 25.I noticed a big difference with oil filters i used to use purelator oil filters now all i use are fram x3.With the purelator oil filter i did notice my oil pressure at little low in drive idling at a light around 15.

your forgetting about windage, and return flow drainage, rates, thicker oils tend to get dragged around with the rotating assembly, and don,t flow back to the sump as quickly, and faster flow rates absorb heat and transfer heat from bearings better.
http://forum.grumpysperformance.com/....php?f=54&t=64

think it thru ..Hydrodynamics pressure is resistance to flow
so higher viscosity more resistance = higher pressure

far less total surface area on the fram filter could easily be what reduces flow rates, and increases pressure

http://forum.grumpysperformance.com/...php?f=54&t=117

Actually I wasn't forgetting about anything, I was simply stating the theory behind tacifiers, and preventing dry starts.