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It really saves gas and gives power!

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

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This topic is in the MVS Volvo Repair Database » Do fuel additives help mpg?
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Gasoline / Oil additives?

I love them.
15
31%
I hate them.
16
33%
I only trust the Lucas Oil ones.
13
27%
They damaged my engine.
4
8%
 
Total votes: 48
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instarx
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Re: It really saves gas and gives power!

Post by instarx »

... and an SE which is heavier than the normal AWD.
2011 XC70 T6 - current
2017 Alfa Romeo Giulia Q2 - Totaled in 2022. Not my fault.
2011 XC60 - sold
2000 V70XC - given to a friend, wish I still had it.

tjts1
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Year and Model: 96 855 NA 5 speed
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Post by tjts1 »

instarx wrote:
KEWROCK wrote:So instarx, You're saying that on the high side you're gettig close to 33 mpg. NO WAY. These ar 4000 lbs school buses with turbo engines. It ain't happening.
If perchance you want to make a little wager that I can't get 32.5 mpg on a 500 mile trip in my stock turbocharged V70 XC schoolbus, just let me know any ol' time. I mean, it's "no way, it ain't happening", right? Easy money for you. :!: Heck, I even have a roof rack.
Its totally doable.
Ambitious but rubbish

Sladethesleeper
Posts: 40
Joined: 8 December 2009
Year and Model: 1998 S70T5
Location: South of Boston

Post by Sladethesleeper »

I stay away from oil additives like the plague.

Back in 2001, I got the bright idea to use Slick 50 in my 91 Explorer. It had 180k miles at the time. One month later, my engine no longer developed oil pressure at any engine speed under 1000RPM. Originally, I upped the oil thickness from 10w30 to 10w40 and eventually to 20w50 to help keep pressure up.

The odd thing, it does indeed have no pressure at the gauge when below 1000k rpm after the engine has warmed up. I replaced the sending unit and eventually ran a mechanical gauge to verify it was not an electrical problem. But, the engine still purrs like a kitten 140k miles later, even with no oil pressure at idle.

Now maybe it was just pure coincidence, but that is enough to keep me from putting it into another car.

As far as volvo mileage, I can't complain about my stock S70T5 with 195k miles on it. If I'm easy on the throttle and go around 68 MPH, I can still manage as high as 31 MPG and as low as 29MPG. I've seen higher, but that was with a noticeable tail wind. That's with the wife, dogs, and a fully loaded trunk on a 360 mile trip that we take every few months, verified with tank fill up measurements in addition to the trip computer.
1998 S70T5 - 210k miles
1998 V70GLT -110k miles
2004 Chevy Silverado 1500 Z71 - 305k miles
1965 Mustang Convertible

I like miles...

polskamafia mjl
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Post by polskamafia mjl »

KEWROCK, simply because you can't get 33 mpg does not by any means that other people can't. If you have read over this entire site then you have read countless threads about people getting 30+ mpg. Is your car at stage 0 yet? Do you have proper tire pressure? Are you running 87 or do make the extra effort to get higher octane fuel? How old are your spark plugs? Are they gapped correctly? What kind of air filter are you using? What kind of oil? Are your calipers dragging? There are an infinite number of things that you may be doing differently then we are. As a result you can't get 30+ mpg while we can. You can accept it or not, but we are happy knowing that we can do something you believe to be impossible.
'All my money is gone and I have an old Volvo.' - Bamse's Turbo Underpants

Current: 1995 Volvo 850 T-5R Manual - Bringing it back from the brink of death
Previous: 1996 Volvo 850 GLT - Totaled

bright
Posts: 163
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Year and Model: 1995 960
Location: Too Hot, USA

Post by bright »

Just for kicks...

1) If these things actually worked car manufacturers and the EPA would have added them to the fuel supply long ago. It is a easy and cheap way (in bulk) to comply with the CAFE requirements. That's the regulation/law which states the fuel efficiency of a group of cars.

2) If it's too good to be true, it is.

3) instarx, I love your avatar. It rocks!

Merry Christmas,
Bright
Many Thanks,
Bright

1995 960 Sedan

marginal
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Post by marginal »

bright wrote:Just for kicks...

1) If these things actually worked car manufacturers and the EPA would have added them to the fuel supply long ago. It is a easy and cheap way (in bulk) to comply with the CAFE requirements. That's the regulation/law which states the fuel efficiency of a group of cars.

2) If it's too good to be true, it is.

3) instarx, I love your avatar. It rocks!

Merry Christmas,
Bright
Why would the have?

bright
Posts: 163
Joined: 14 October 2009
Year and Model: 1995 960
Location: Too Hot, USA

Post by bright »

Why would the have?
What do you mean?

Bright
Many Thanks,
Bright

1995 960 Sedan

marginal
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Post by marginal »

Why would have added them to the fuel supply long ago?

bright
Posts: 163
Joined: 14 October 2009
Year and Model: 1995 960
Location: Too Hot, USA

Post by bright »

Oh, I get what you understand.

For example, there are mandates for pollution control. Some of these are handled within the car (EGR, catalytic converters, etc) while others can be dealt with externally (fuel additives.) The gas you get varies during different parts of the year to help with pollution abatement. It's one of the reasons why you see the fuel pumps state that "This fuel may contain up to 10% ethanol." Ethanol helps control certain pollutants, along with other issues.

Among those other issues are corn ethanol subsidies. Since those were passed you'll never get them repealed. Ever. That is a side effect of the US Electoral College. But that is the politics of fuel and farming...

If the Lucas stuff really did what it claims it does, it would be easier to add it to all vehicles so they would all get better mpg. And it would be easiest to do this at the pump.

Manufacturing and distributing this stuff in little bottles is pretty expensive compared to making it and supplementing the fuel supply directly.
Many Thanks,
Bright

1995 960 Sedan

bright
Posts: 163
Joined: 14 October 2009
Year and Model: 1995 960
Location: Too Hot, USA

Post by bright »

I have to say this...all of us 900 driving people would *kill* to get in the 30's. I would be happy with the mid 20s. But nope. I get 23 if I am very careful on the interstate (60 mph, no traffic). Around town, I get 21 or so. And I drive "cautiously." My elderly Mom gets irritated because I drive too slow.

I tell people I'm all about the cruise. But man, couldn't' I get the MPG too?
Many Thanks,
Bright

1995 960 Sedan

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