Synthetic 5-30 is the same as dino 5-30 for viscosity out of the bottle. it'* over time and miles that dino breaks down and loses viscosity where synthetic retains it'* viscosity.

Hence synthenitc does not break down and get thinner. Dino does and hence your oil pressure drops off w/dino.

It has nothing to do with viscosity, as stated above. It'* simply an issue of sludge and buildup. If it causes leaks, there'* no point in switching back to Dino juice.

Okay, well then.. alright. Guess a blend would be good. Maybe a High-Mileage synthetic. Valvoline has some, I think.


-justin

I'll 2nd that. A friend of mine has a 97 Cougar. He switched over around 95K and has alot of leaks. Mine has not burned any oil and no leaks (knock on wood) since I got it two years ago.

dont u guys worry about not seeing an intake leak fast enought cuz wouldnt he first sign of the bad intake be antifreeze in the oil? if so u wouldnt see that very soon if u changed every 6,000 other then 3,000?

The first indicator will be a lower level in your coolant reservior. And checking the oil should be more frequent than changing it, especially for the L36 crowd running OEM UIM'*.

i dont mean to get off topic but i have a quick question: when u cheak ur oil with the dipstick what will u see if u have a intake leak?

Chocolate milk. No kidding. And check it hot.

I've seen white foam before...but that was really small amount of condensate

man im so scared of my intake failing i really dont wanna spend all that money at a dealership and i cant drive a broken car to my dads across state to fix it either.