What oil to use in a 3.5L V8 Rover engine? - Defender Source
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Old April 12th, 2013, 10:49 AM
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RYAN BEIS
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What oil to use in a 3.5L V8 Rover engine?

Anybody know what type oil to use in a 3.5L V8 Rover engine, or does anybody have any suggestions? I've heard 10W, but have also heard people running 20W-50 and 15W-40... What's the best option here?

Before anybody says: look it up on google, or look in your owner's manual...
1) I've looked it up on google, and if I had luck, I wouldn't waste time posting this.
2) I don't have an owner's manual - it's an '83

I should probably put those last two disclaimers in every one of my posts.

Thanks!
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  #2  
Old April 12th, 2013, 10:57 AM
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There is nothing really different from an oil standpoint for a 3.5 litre V8 to other rover V8s used in 93-95 D90s. I am partial to 0w40 or 5w40 synthetic. If the engine is older and worn more (so that you get lifter clatter at start up with those choices) I would consider the heavier 20w50 oil again, I am a big synthetic fan.
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Old April 12th, 2013, 03:17 PM
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Valvoline VR1 Racing Oil
Comes in 10W-30 and 20W-50. High levels of ZDDP for anti-wear protection. Available at NAPA.

Also available in synthetic (5W-30, 10W-30 and 20W-50)

http://www.valvoline.com/products/br...ing-motor-oil/
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  #4  
Old April 12th, 2013, 03:30 PM
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It does not matter tons as they are not that well designed compared to a modern engine and wear quickly. A diesel oil is a good idea as the flat tappets can see some help from the higher ZDDP.

These engines have very high wear rates (based on oil analysis) regardless of oil compared to a modern engine, so change often.
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Old April 12th, 2013, 09:50 PM
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Rotella used to be good it is shit now, you'll need a zinc additive.

VR1 or Amsoil 10w40 if you like synthetic. Mobil 10w40 high mileage isn't bad..

I have a beat to shit 3.9 in my Hunter with most of a Crower cam, it does the best with 10w30. It runs hot and spend a lot of time on the fuel cut.
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Old April 12th, 2013, 11:39 PM
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On both the 3.5l '83 that I just sold and the 4.2l '93 RR that I still have I used to use regular Mobil 10w-40# and thought it was a good oil....until I decided to switch to Penzoil of the same weight on both!
Within the first week....I immediately noticed the annoying leaks underneath dry up....not only on one but both my 3.5 and the 4.2!
Also noticed the oil stayed a more normal color after a 1500 to 2000 miles compared to mobil....I even noticed the exhaust did not smell as foul!
You do not need to use synthetics in these engines....I do thinner viscosity for winter and thicker for summer!
I really like Penzoil!
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Old April 13th, 2013, 01:28 PM
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Quote:
Originally Posted by grnthng View Post
On both the 3.5l '83 that I just sold and the 4.2l '93 RR that I still have I used to use regular Mobil 10w-40# and thought it was a good oil....until I decided to switch to Penzoil of the same weight on both!
Within the first week....I immediately noticed the annoying leaks underneath dry up....not only on one but both my 3.5 and the 4.2!
Also noticed the oil stayed a more normal color after a 1500 to 2000 miles compared to mobil....I even noticed the exhaust did not smell as foul!
You do not need to use synthetics in these engines....I do thinner viscosity for winter and thicker for summer!
I really like Penzoil!
That's great advice man, thanks!
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Old April 28th, 2013, 01:49 PM
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I have an "83" 110 with a 3.5l v8. Where can I get a hold of al of the fluids needs to keep the engine running? What is recommended?
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Old April 28th, 2013, 03:06 PM
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Quote:
Originally Posted by Landyman1 View Post
I have an "83" 110 with a 3.5l v8. Where can I get a hold of al of the fluids needs to keep the engine running? What is recommended?
Remember these are basic v8's regular basic service will do a rover good. Drive it often and keep her cool. She'll last a long time.
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Old April 28th, 2013, 05:07 PM
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Everyone has an opinion on oil. I run 0w40 or 5w40 synthetic. If you are switching over from regular oil, change the filter at 500 or 1000 miles and, if after you hold it upside down to drain the oil, it is heavy, keep doing filter changes at short intervals until it no longer is heavy.
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