richardsayzz

So After my first free oil changes I decided to use 5w-20 royal purple (since they dont make a 0w20) I've noticed my mpg has taken a drastic hit.

Is this normal? Or should I switch back to 0w.

also what is better for the engine?

shadowler

iTrader: (3)

explain in more detail please as I never used 0w-20 only mobile1 5w-20 full syn. I have 2010 tC averaging about 315-330 miles before light comes on. I drive speed limit.

richardsayzz

Isn't 0w-20 the oil weight they use for the standard free oil changes from the dealer?

CIONIDE

iTrader: (1)

The dealership I purchased my xB from uses 5w-20 blended oil, not full synth. When I switched to Mobil1 5w-20 full synth, my mpg went up, not down.

mnscionxb

dealers not giving you syn, unless you pay for it .
im sure there both 0w 20/ 5w 20 good to run all depends on what you want to pay for .

GoldenxB2RS5

Want a good hint?

Goto walmart, Buy Mobile 1 full synthetic for $18 bucks, then take it to your dealership saves you a ton of money!

drewsxb808

i been running 0w-20 for about 2 years now and its made a pretty big impact on mpg. its funny cause my last oil change i went cheaper than my usual $7.50 per quart of mobil 1 0w-20 (went with penzoil 5w-20) and i could totally feel the difference in acceleration. feels like the pedal is lighter and throttle reaction is better now that im back on the 0w-20. maybe its just a placebo type effect but im sticking with 0w-20. worth the extra money, plus it only takes like 15 mins to do it yourself and not pay someone for such a small job.

GoldenxB2RS5

You like the 0W-20 over 5w-20?

elwaylite

iTrader: (1)

You really are looking at the wrong numbers. Look at the oil specs and the 100 celsius cst. Some 5w-30's have a lower pumping viscosity at 100c than a 5w-20. If you are worried about MPG's, find the lowest cst at 100C of a particular 20 or 30 weight, dont center on the 0 or 5, because the car warms up quickly.

I went from 0w-20 to 5w-30 and saw a couple of tenths, but nothing major. Im driving my car harder, so the protection to heat matters more to me than mpg's.

wrczx3

I think you guys are all nuts. 0-20,5-20,5-30,semi synthetic or full synthetic doesn't mean one bit of difference in day to day driving. Unless you live in the Sahara Desert or the North Pole or you are turbo charged, you will be lucky to see 1-2 tenths of a gallon difference. You will never notice any performance difference by using the butt dyno either. I have tried them all through every season for the past 30 years and never noiced any mpg or performance difference. That being said, I do think synthetic will help in LONG term reliablity. My Xb has seen every weight,blend and brand out there and I get 23.7 mpg no matter what.

elwaylite

iTrader: (1)

While I agree you wont see much between weights and mpg's, thats not the only reason to choose a weight. If you drive your car normal, or have a lot of hwy miles, 0w-20/5w-20 is A-OK. If you like to drive the car a little harder, and live in a hot climate, go with 5w-30.

Dont base oil choices on mpg's.