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Discussion Starter · #1 ·
I'm new here. I have a 2001 V70 T5 manual with 19,700 miles. I use the dealer's 5/30 every three months since purchase (3/01). I want someone to talk me into synthetic motor oil. I really want to switch, but for some reason I'm afraid. What do those opposed to synthetic say against it? Thanks.<p>It's not whether you win or lose...it's how you place the blame.
 

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Re: Synthetic Oil...or not (Chronic)

Most synthetics are man made for the most part. As such the make up of said chemicals can be tailored better to suit an engines enviornment. Especially those of us with a little turbine hooked onto our motors. Dino oil is very refined. It does a good job no doubt about that if you change oil religiously every 3k miles. But be very careful some of the popular "synthetic" brands read Mobil1 and other big brands have dino oil in them and are more refined than normal. Its a govt loophole.<br>And heres the bad side of a <B>true</B> synthetic the cost. It is between $5-$8 a quart. But some of these synthetics have 1 year drain intervals. No I am not doing one oil change a year, but I will be more lienient with my changes.<p>Goto <A HREF="http://www.amsoil.com/" TARGET="_blank">http://www.amsoil.com/</a> for more info. I am using their Series 2000 0W-30 in my C70. Read their documentation and other documentation out on the web. Pretty interesting.
 

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Re: Synthetic Oil...or not (Beemer_eater)

I guess I've been a "synthetic blend" oil for 30K with no problems. I've been using Mobil1 Tri-synthetic. The oil still looks pretty good after 5K miles. I guess I'll stick with this since I can't afford $6/qt for amsoil oil.
 

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Re: Synthetic Oil...or not (Chronic)

You should change your oil at least every 5000 miles, more often in severe conditions (mostly city driving, dusty, dirty or sandy conditions). The problem is that the additives that prevent corrosion and the detergents that prevent build-ups break down, and this happens to natural oils as well as synthetic oils. In normal driving the problem is not the lubricatant but the additives.<p>If your trips last only a few minutes, more so in cold weather, you can get condensation (water) inside your engine. The additives in the oil will emulsify this water and protect the parts from rusting until the next time your engine is driven long enough to "cook off" all the moisture.<p>Dirt and gunk, fine metal shavings, and bits of carbon will accumulate in your oil over time--natural or synthetic oils need to be changed regularly to remove these contaminants.<p>Click and Clack the tappet brothers (Car Talk) are conducting a lubrication experiment on a Dodge Vista. They claim to have gone ~40,000 miles --perhaps more, I haven't heard them for a while-- without an oil change. Their theory is that since the car already leaks/burns so much oil that the quart a week of new oil they have to add has created a "steady state" of contamination, where no further engine wear / damage can take place. <p>Turbo cars should use synthetic oil because they resist decomposition at the extreme temperatures found at the turbo bearings longer than natural oils. Try putting different vegetable oils in a hot frying pan--see how the first cold pressing extra virgin olive oil begins to turn brown and smoke--that happens at your turbo bearings when you shut off a hot engine. You'll get a nice ring of carbon anywhere there's enough space. Then this carbon will grind away at the metal at your next cold start--adding metal shavings to the mix. Soon you'll have nice big tolerances at the turbo bearings--which will create even more of your oil/grinding compound slurry. Little by little, oil will go squirting over to the intake side and gum-up the throttle body, injectors and plugs, and squishing over to the exhaust side into the downpipe and plugging-up the catalytic converter. <p>In your frying-pan experiment you may find corn oil can take a little more heat for a little longer. Asians use peanut oil in their woks because it can handle much higher temps. This is why castor bean oil used to be used for race engine lubrication (Castrol).<p>Synthetic oils have both a temperature advantage and equal protection with lower viscosity--less power is wasted moving oil around inside the engine = better fuel economy & quicker car.<p>(but probably less than you would notice).<p>I have a theory about cars: if you love them they run better. i think my car runs better after I hand wash it. i think my car runs better after i change the oil and filters. i think my car runs better with Mobil 1 and Sunoco 94.<p>feeling good is worth something<p>
 

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Discussion Starter · #5 ·
Re: Synthetic Oil...or not (petew)

Is it true that changing to synthetic oil is a permanant switch? In other words, you can't go back to standard "dino" oil. (I don't know why one would want to go back, but it seems so drastic.) Also, what do you think...is Amsoil worth the price, or is Mobil 1 true synthetic sufficient?
 

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Re: Synthetic Oil...or not (petew)

Yeah...but olive oil is still the king of all oils! <IMG NAME="icon" SRC="http://********************/smile/emwink.gif" BORDER="0"><p>Yannis
 

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Discussion Starter · #7 ·
Re: Synthetic Oil...or not (GrecianVolvo)

I notice there are three Amsoil motor oils (i.e. Series 2000, XL7500, and SAE). What are the differences? If one goes by the price, it's easy to tell which is suppose to be best. <br>I currently use the dealer's 5/30 dino oil. I notice that the Series 2000 and others have a 0/30. If I switch, should I stick with 5/30 or change to 0/30? What's the difference? By the way, I'm not out racing this thing...yet.<p>Chronic<br>2001 V70 T5 manual<br>K&N air filter<br>Fingers crossed <br> <br>
 

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Re: Synthetic Oil...or not (Chronic)

<BLOCKQUOTE>quote:<HR>I notice there are three Amsoil motor oils (i.e. Series 2000, XL7500, and SAE). What are the differences? <br><HR></BLOCKQUOTE><p>The series 2000 is a "real" synthetic. Thats why the high price. The XL 7500 is to compete against Mobil 1 etc.... Those are very refined dino oils with synthetic lubes in them, but it is not a true synthetic.<p>Its up to you. Good luck.
 
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