Oil Question

[JustinC9905]

I have heard that once you put synthetic oil into your engine you should never go back to regular oil. I was wondering if this is true? and why that is? Thanks.

[CanaMark]

That is not true, I have asked time and time again parts people from several different companies. You can go from syn to reg, reg to syn. Just do not mix syn oil, brand names primarly and weight. If you go syn always buy same brand and weight. But you can switch from syn to reg, reg to syn. Just remember to switch out the oil filter to.

[fredjacksonsan]

True enough, but maybe not a good idea to switch back and forth repeatedly.

[CanaMark]

But of course fredjacksonsan

[fredjacksonsan]

Hey, some folks may not know...

[jeeper61]

Originally Posted by CanaMark

That is not true, I have asked time and time again parts people from several different companies. You can go from syn to reg, reg to syn. Just do not mix syn oil, brand names primarly and weight. If you go syn always buy same brand and weight. But you can switch from syn to reg, reg to syn. Just remember to switch out the oil filter to.

Actually Oil is Oil is Oil.......

IF you have to, you can mix any engine oil with what is in your engine. Synthetic is fully compatible with the regular crude based oils and will do no harm to anyones engine.

It may be preferable to use same brand, viscosity and everything but it will not damage the parts to mix them.

[JustinC9905]

How do you guys know this? Do you know any websites or literature that verifies what you are saying? not that I dont believe you, I am just curious for myself to maybe read why things are the way you are saying they are (ie. you can or cant mix regular oil with synthetic). Thanks guys.

[fredjacksonsan]

Check the websites for most synthetics (Amsoil, Royal Purple, Mobil1 for example) and you'll see they claim that their synthetics are 100% compatible with mineral oil. They've got to be to some extent, or you'd never be able to switch to them.

I don't know why someone would want to switch back to regular oil; even though it's cheaper than synthetics per oil change, the longer change interval and increased mpg make up for it (even if you only get 1mpg more)

[JDPascal]

try this web site
http://www.bobistheoilguy.com/

JD

[bdiamond69]

if you dont know stick with what you got

[Flash75]

The link below will take you to an Oil article by Kit Sullivan. Kit has over 15 years experience as a automotive lubrication engineer. This article is long but has some interesting information.

http://www.lincolnsonline.com/article105.html

Clifton

[fredjacksonsan]

Great articles, guys....thanx.

[CanaMark]

Different oils act differently when heated and when in the engine. It is not wise to mix and match 10 different oils that are on sale at Walmart. Synthetic is double the cost per volume, but it last 3 times as long. I prefer to use 100% Synthetic, but I change it out more frequent then the norm.

[fredjacksonsan]

Very true; although different oils are all rated to work in your engine, you should stick to a brand once you start using it. In the articles listed above, they point out that each oil and manufacturer utilize a different cocktail of additives. Consistency is best.