What weight oil? 2006 xc70

[AlanS]

I've always used Mobil 1 in my cars....my 850 has 230k, no oil loss... So...what weight M1 do I use in my 2006 xc70- 70K on the dial right now? It's approaching summer (I hope) on Long Island NY... So what do you all recommended for the Spring/ Summer? I want to do a change this coming weekend.

[Cam]

M1 0W30 or 0W40. For the price you can't beat it. Amazon or Wally World have great prices.

Here is the link that will tell you all you will want to know about oil:

http://www.bobistheoilguy.com/motor-oil-101/

In Vermont I use 0W30 in the winter and 0W40 in the summer. If I still lived in Atlanta I'd stick with 0W40 all year.

[Iroll_]

Castrol or Mobil 0w-40; world class oil(s).
I also have used Mos2 for the last five oil changes-with great results.

http://www.amazon.com/Liqui-Moly-200.../dp/B003U4O414

[Astro14]

http://www.volvoxc.com/forums/showth...Oil-Rant/page5

[JRL]

I prefer 5w 30 for our climate (which is the same as yours)

[Astro14]

Oil specification matters far more than weight in this engine.

So, I would strongly encourage you to use a Euro spec oil, like the M1 0W40, which is about the best oil that you can buy for this engine (I've posted UOA on this oil in this engine before. Simply: it was great over a 7,500 miles drain interval). That's what your owner's manual means when it says "ACEA A1/B1"...but people skip that and only read "5W30"...read the TNN on removing sludge in this engine in the resources section...and the ACEA specification is very clearly laid out. Because that is what matters.

If you prefer a slightly thinner oil, then a 0W30 oil by any of the big producers: Mobil, Castrol, Pennzoil would be fine. Budget matters to me...so, I go with what I get on sale that meets specification. Pennzoil Euro for example, in a 5W30 is running in the wife's XC right now. I notice a slight increase in consumption with a 5W30 over the 5W40 that had previously been in there.

But the specification is what determines if the additives in the oil will stand up to a longer drain interval and prevent sludge over that interval. You could have a 5W30 that starts forming sludge in this engine after 3,000 miles, or a 5W30 Like the Mobil 1 ESP that lasts for 15,000 miles. They differ by additive/specification. That's what really matters

[vtl]

My 05 XC70 started to use too much 5w30 A5/B5 oil after 100k on the odo. Eventually switched to 0w40, again Amsoil Signature. Price is irrelevant, since one change is less than two full tanks of gas.

[Reverend]

M1 0W40, which is about the best oil that you can buy for this engine (I've posted UOA on this oil in this engine before. Simply: it was great over a 7,500 miles drain interval).

-=snip=-

and the ACEA specification is very clearly laid out. Because that is what matters.

This.
I've posted my M1 10/30 oil analysis here on the forum too and my 2.5t has plenty of life left at 10K oil change intervals. At 15K it's getting too close to the margins for me (but it was still good).

[billr99]

My 05 XC70 started to use too much 5w30 A5/B5 oil after 100k on the odo. Eventually switched to 0w40, again Amsoil Signature. Price is irrelevant, since one change is less than two full tanks of gas.

So what are we talking here in regard to "too much" and what was your end result after the change to 0w40?

I just changed to 0w40 on my '02 which was "losing" about a litre and a half or so every 10K kms. Haven't put any time on it yet, so looking to see what I might have gained from those who have experience with that weight.

Cheers,

Bill

[vtl]

So what are we talking here in regard to "too much" and what was your end result after the change to 0w40?

I just changed to 0w40 on my '02 which was "losing" about a litre and a half or so every 10K kms. Haven't put any time on it yet, so looking to see what I might have gained from those who have experience with that weight.

Cheers,

Bill

I was loosing about 160 ml every 1k km, got it down to 110 ml after soaking piston rings overnight in two cans of seafoam. I knew rings are bad, because plugs had grains of oil additives on negative electrodes. Can't really compare to w40 consumption, 'cause I moved closer to work and now my trips are way shorter and back roads alone, compared to 30 mins of parking lot to get out of Boston suburbs and than 20 miles at 80 mph. In 2k miles car says it has 79.6% of oil (one mark off of the top on the dip stick), but, again, I put only 6 quarts, which is a bit less than required.