change weight (oil)?

[BadMoFo]

well its time to change the oil in the stang and I was wondering with the cooler weather if I need to change the weight. I currently run 10W30. only reason I ask is the oil press guage reads lower since the cooler weather has hit. when its warmer out its back to where it is normally.

[Notch93]

You could switch to 5W30.


"Oil viscosity can make a big difference when it comes to getting lubrication to the furthest parts from the oil pump, which is usually the valve train. Besides improving gas mileage, if it gets near or below freezing where you live you should definitely be using a 5w-30 oil.
Why? Consider this: 5w-30 takes 10 seconds to reach the valve train at 15 degrees Fahrenheit, compared to 20 seconds for 10w-30. Even worse, while 5w-30 is flowing freely in 40 seconds 10w-30 weight takes up to three minutes. Even better, consider switching to a synthetic oil, which will flow freely in 15 seconds at 15 degrees."

[nastynotchback1]

well its time to change the oil in the stang and I was wondering with the cooler weather if I need to change the weight. I currently run 10W30. only reason I ask is the oil press guage reads lower since the cooler weather has hit. when its warmer out its back to where it is normally.

That sounds backwards.thicker oil in the summer and thinner in the winter is what alot of people go by.i have always used 10w40 year round with no problems.

[SVTSkip]

Same here. I run 10/30 or 10/40 all the time in numerous Stangs that went well over 200,000 miles without an issue...

[WILDSTANGRACING]

i always stick with 10 30 year round

[crumbie]

my oil pressure started getting lower over the summer when it was really hot outside and when the car got up to temp. now that it's cooled off, it's back to right in the middle or NORMAL on the gauge. i've always run 10w-30 mobil one synthetic.