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Another oil thread....bear with me

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

brick_and_motor
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brick_and_motor

Another oil thread....bear with me

Post by brick_and_motor » Tue Feb 14, 2017 4:37 am

I am probably over-thinking this but I wanted to put this quandary out to you all for collective opinion. The first thing I'm going to do on my '98 S70 NA is an oil change and I'm debating what oil to use.

My '98 V70 GLT has recently had its second oil change (I changed it when I bought the car in September and then again in January after ~3K miles). Both times it received Quaker State (Pennzoil) 10w30 dino oil because both times that was the special at our local Advance. Now, when I drained the oil in January, it flowed out golden and smooth. I thought this was pretty neat that it appeared to hold up nicely between changes.

The next day, I changed the oil in my '02 VW Golf GL. The oil change intervals were the same (3-4 months and ~3K miles) but in the Golf I used Kendall GT-1 5w30 semi-synthetic for the previous change. However, when I drained the oil out of it, it flowed out blacker but still smoothly. There is very little difference in driving conditions between the two cars with just a slight nod to the VW for more highway driving. One caveat is that the VW uses/looses ~1 quart between changes so it had been topped off prior to changing.

Both cars have roughly the same miles (143K) and use Purolator Classic oil filters rated at 97.5% efficiency.

So to my question: which oil do you think is performing better? Specifically, is the Kendall oil with its darker color, doing a better job of cleaning out the motor and preventing build up of deposits; or is the QS performing better by appearing to break down less over 3K miles?
1998 V70 GLT
1998 S70 NA
1988 Chevrolet C1500

850 LPT
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850 LPT

Re: Another oil thread....bear with me

Post by 850 LPT » Tue Feb 14, 2017 5:47 am

I agree you are overthinking this :lol:

You are doing the right and most important thing, which is to change the oil at 3k. This is a good interval if you are using dino oil.

But please make sure you use OEM quality oil filters. I think Mann filters are what most people use, I know I do. Do some research here on the differences between these and lesser quality filters, I'm not sure on Purolators. It's mainly about the lack of a proper check valve that prevents drainage from the head if I remember right.
96' 850 sedan, base, auto, pewter/charcoal, 115k miles
99' S70, base, 5-speed manual, nautic blue/ tan, 213k miles
04' V70, auto, ash gold/ tan, 229k miles, daughters car
05' V70, 5-speed manual, loaded, mistral green/ tan, 146k miles
79' Ford Capri S, Euro Spec 2.8 V6, T9 5-speed manual
58' Porsche Diesel Junior
13' Honda Odyssey :oops:

tryingbe
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tryingbe

Re: Another oil thread....bear with me

Post by tryingbe » Tue Feb 14, 2017 6:02 am

This is the only real test. Color of the oil doesn't mean much. I use AMSOil since I can get it for $4.5 a qt.
http://blackstone-labs.com/


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85 GLH, 367 whp
00 Insight, 72 mpg

brick_and_motor
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brick_and_motor

Re: Another oil thread....bear with me

Post by brick_and_motor » Tue Feb 14, 2017 7:03 am

850 LPT wrote:I agree you are overthinking this :lol:

You are doing the right and most important thing, which is to change the oil at 3k. This is a good interval if you are using dino oil.

But please make sure you use OEM quality oil filters. I think Mann filters are what most people use, I know I do. Do some research here on the differences between these and lesser quality filters, I'm not sure on Purolators. It's mainly about the lack of a proper check valve that prevents drainage from the head if I remember right.
Re the filters, Purolator owns Mann and it's no orange can of death like the FRAM. Can't say for certain they are identical, but I do know that Purolator makes a quality filter. That said, now that I have 2 Volvos and will be selling the VW, I will purchase the 10 pack of Mann filters from FCP currently on sale for $47 - can't beat $4.70 a filter.
1998 V70 GLT
1998 S70 NA
1988 Chevrolet C1500

benpineapple
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benpineapple

Re: Another oil thread....bear with me

Post by benpineapple » Tue Feb 14, 2017 8:03 am

I used to use purolator filters, but they're kind of a hassle to instal and remove. Not a lot of side access on the P80 filters. I K&N filters, because they have a lug on the end to easily remove with a socket wrench.I also had a purolator randomly get frozen on my block, which was odd. Could have been user error rather than poor filter components, but there's no way to know for sure.

Here's a thread documenting it, including a fantastic oil strap tool that makes P80 filter removals a cinch.
viewtopic.php?f=1&t=78771&p=423761#p423761
2006 V50 T5
2001 V70 X/C AWD

1998 V70 AWD [RIP at 249,255M]
1990 240 [SOLD at 220xxxM]

j-dawg
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j-dawg

Re: Another oil thread....bear with me

Post by j-dawg » Tue Feb 14, 2017 8:07 am

if your oil comes out looking the same as it went in, that would almost be more alarming to me than if it didn't. never had oil come out of any car looking anything but dark brown (or black out of my diesel Mercedes).
1999 V70 T5 5-SPD | ~270k mi | burns more oil than gasoline

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theWIFES_S70
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theWIFES_S70

Re: Another oil thread....bear with me

Post by theWIFES_S70 » Tue Feb 14, 2017 8:27 am

brick_and_motor wrote:
850 LPT wrote:I will purchase the 10 pack of Mann filters from FCP currently on sale for $47 - can't beat $4.70 a filter.
Uhm, you all should probably check out the Rockauto closeout price right now...

Ordering 10 right now...
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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rspi
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rspi

Re: Another oil thread....bear with me

Post by rspi » Tue Feb 14, 2017 9:21 am

brick_and_motor wrote:... that was the special at our local Advance...
If it's not good for your engine, the "special" can cost you more with engine repairs.

Turbo = full synthetic.

I'm with tryingtobe, if you plan to keep the vehicle, get your oil tested.

'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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