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New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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Roger_850T
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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by Roger_850T » Tue Jun 05, 2018 9:14 pm

To add, (or repeat) what others have said... The first number (0W or 5W or 10W) is the cold viscosity. W is for Winter. If you think you're going to see very cold temperatures before the next oil change, then worry about it, otherwise probably not. The second number is the viscosity at a fixed higher temp, which is what it sees when the engine is running. If you're going to be running in hotter temperatures, then thicker (40) is a better plan than 30. To me, hotter means >100°F. If you're not going to see hotter than 90F (ok, 86F?) then 30 will probably be fine.

The second item is how long are you going to leave the oil in. Some people like to leave it in a long time, and not change it for 7500 to 15000 miles. That's when the synthetic is useful. I personally prefer to change it often, every 3,333 miles, so I put in regular mineral oil and do just fine. (2 different Volvos over 300k miles on mineral oil, so it's certainly not harmful.) Many people have reported that when they switch from mineral oil to synthetic, all the old oil seals start to leak horribly, and didn't stop until they replaced the seals. Again, I just stick to mineral oil and change it often.

For the longest time, Chevron was my favorite oil - because I could buy it cheaply at Costco. Now I've moved, and my local Costco now has Havoline (which is actually made by Chevron, so it seems to be the same thing.) Again, it's cheap, and I change it often. Second choice is Shell, which is available inexpensively at Home Depot. I tried using the Castrol at Walmart, but actually ran into some problems with the Castrol Magnetek and the oil level sensor on my XC90, so I'm back to the Chevron (Havoline) again.

But back to your original question - I think most of the viscosities you listed will be fine, and would recommend to pick the one that is convenient. The most important thing is to change it regularly.

Roger


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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by abscate » Mon Jun 11, 2018 11:44 am

Just don't mix Shell and Mobil oils...its on the internet as to why..


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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by oragex » Mon Jun 11, 2018 12:15 pm

June wrote:
Tue Jun 05, 2018 7:12 pm
I drive through Oklahoma occasionally. In July 2016 my last pass through my dash said it was 121° during the heat of the day flying down the interstate heading North through the northern part of the state. Opening the door was like opening the oven. June

That sounds convincing.


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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by dandan » Sun Jun 17, 2018 11:27 am

IMG_5033.JPG
Last week I went ahead and change the oil with Mobil 1 0w40. the oil in the vehicle had about 500+ miles on it and came out strong coffee black. I also changed out the drain plug and the oil filter housing.
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The old oil filter looked decent, but replaced it with a mann filter. I'll drive it about 1000 miles and replace the filter and top off with fresh oil, then keep the oil maintenance steady from here on out. I'm not sure if i'll go to the 7,500 mile service or just change it everything 3,500-4k miles.
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I also had an overheating issue a couple weeks ago and changed out the cooling fan..
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I also tried to gut the old fan motor to see if I could replace components as its kind of what i do for a living. but this motor is built to tear apart but not service...
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I looks as if a few cold solder points are there but I didn't even bother to repair as I had to rip the shroud apart to get to anything.



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dandan
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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by dandan » Sun Jun 17, 2018 11:32 am

Also getting this in vida, not sure how to approach it, one user did mention to go ahead and change the thermostat. This is a good indicator for this? Or should i tinker with the coolant temp sensor first?
coolant thermostat.PNG



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Re: New 08 XC90 3.2 AWD - Stage 0 - Oil viscosity in HOT climate

Post by oragex » Mon Jun 18, 2018 2:43 am

Maybe look at the temp gauge needle, as the car is warming up, does the needle climb at a steady rate? Also inspect the wires to the coolant temp sensor, in particular right where they go into the electrical connector, sometimes they can crack at that point

The old oil filter looks really clean. Perhaps the car was already running on synthetic oil before. Maybe just keep an weekly eye on the oil level just to be safe


2003 2.4i S60 automatic 125k miles

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