Oil level shows about 1.5 qts high oil changed 6

Check the oil on the dipstick. If it is high, it may be contaminated with gas or coolant. You can smell if it is gas. If it is coolant, it will look milky brown color. That would point to a head gasket problem.

If the oil looks good and not contaminated, but still high, drain enough out the drain plug until oil is at proper level, or just go ahead and drain all the oil so it can be looked at at for contamination. Because if jiffy lube put too much in, you are right, the light should have come on sooner. The whirring noise could very well be from a high oil level, so look into all possibilities. If oil is not too high, it could be just a sensor problem-but it doesn't sound like it. Good luck.

well, I am old school, I do not buy into "High Mileage"oils, nor synthetic oils, nor synthetic blends...unless your car has required it and has seen only synthetic since day 1.

I suggest as long as you change oil and the filter every 3000 or 3 months, and can afford to do so, i wouldn't worry about the best, barring there are no current revealing problems. Just use the proper viscosity oil for your car, and proper level. I think your car is 10w-30 year round, 4 1/2 qts. with filter change...always check level after change to make sure it's on par.

Popular brands are CAM-2, Penzoil, Valvoline, Quaker State, Castrol, Mobil. They are all the same to me.

These are only suggestions...you do what you think is best for you.

WHITE smoke? Or BLUE smoke? White smoke is usually caused by burning antifreeze (possible blown head gasket). Engine oil burning causes a bluish colored smoke.

Changing the oil two months ago means absolutely nothing to me. I have customers that travel 6000 miles or more in a month. Oil consumption is measured in volume over miles, not volume over months. It is normal for most 4 cylinder engines to use a little less than 1/2 quart in 1000 miles (even more than that for 6 cylinder and 8 cylinder engines).

Honestly, there is no "best"....
If you want a decent oil that performs well and is cost effective, then your Mazda will be happy with Walmarts full synthetic oil.
I was 17.99 2 years ago for 5 qts, now is about 23.00.
Still a decent buy and works well. Suggest 5W30 for cooler months and 10W30 for warmer months.
You should change this oil about every 6,000 miles (can run to 8,000 but I would not recommend it).
Use a GOOD filter - never Fram. Most others are better!

The only liquid that can be getting into the crankcase and mixing with the oil is engine coolant. This is caused by a bad head gasket. Driving the truck as it is will cause serious engine damage. Have it looked at by a professional mechanic before driving it again.

It depends if you changed only the oil or if you changed the filter as well. If the filter was changed, it is quite common for a high reading especially if you have not yet run the engine. It may show a quart high until you start and run for a few minutes. This allows the new oil filter to fill up with oil.

If you changed only the oil, you may have left some dirty oil behind and that's why it reads high. Or, for example, the actual refill amount is 4 qts. and you added 5.

I just bought a 2005 envoy too. I read in the manual that the 4.6 6 cyl engine needs 7 qts total. 2 Over the normal oil change. Is it possible it wasn't low to start? I noticed when Walmart changed the oil they charged extra for the change because it needed the two extra qts. However my dip stick has oil over the full mark. Seemed strange but I haven't had any leaks and after 3k mile no change in level. Make sure you had the correct about the first time.

I show the capacity as 6.5 quarts, but owners report that 7.0 quarts with a filter change leave the level right at the top of the dipstick. Hope this helps.

very common problem you are burning oil. the piston rings, that nissan used are the problem. We see quite a few of the 3.5 liter engines loosing oil due to piston ring problem. nissan sais that 1qt. per 3500 miles is exceptable, but who want a vehicle that burns oil?? not me. good luck with that.

Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!