Is it bad if.... - Toyota Yaris Forums

Slummy · 09-26-2007, 09:48 AM

Is it bad to switch from regular oil to synthetic and back again?

If this is a repost sorry, I'm too lazy to do search right now.

Kaotic Lazagna · 09-26-2007, 12:27 PM

i think it is...although i can't tell you why.

PolarWhite · 09-26-2007, 12:41 PM

I cannot speak for every brand out there, but I can speak for VALVOLINE since I work for them. Our formulations are all compatible with one another. You could switch back and forth between conventional, synthetic blend or the full synthetic as much as you wanted to with no ill results. I cannot tell you if that is the same with all motor oils though. Hope that helps.

tsportman · 09-26-2007, 03:12 PM

I work in a car-parts store myself and people who tell you that you can't change from fully to half synthetic or even mineral oil live in the past.
For years this had negative effects on the lubrication in the engine.
It came all down to additives wich weren't compatible to one-another.
In recent years everything has changed and nowadays you can put in whatever oil you want, or even mix different ones, although i think you shouldn't mix more than two oils.
Keep in mind to follow the constructors advice on the viscosity !
Otherwise you will reduce engine life rapidly !

Slummy · 09-26-2007, 10:30 PM

Thanks for the advice everyone. I did my last oil change myself (synthetic) but decided to go to the dealer and have them do it this time (regular). I think from now on I will just take it there. It doesn't cost much more, and I don t have to deal with it!

PetersRedYaris · 09-26-2007, 10:32 PM

You can switch all you want without problems.

Black Yaris · 09-26-2007, 10:34 PM

That is Bull shit.... you can go back and forth from full synthetic (most synthitic are made from mineral oils), to mineral oils, to blends... to any combonation between... anyone saying otherwise is yankin your chain

CompanyXPaladin · 09-29-2007, 03:25 AM

I can tell you its a bad idea in a car with an older engine designed to consume oil (take... a rotary (Wankel) engined RX7). In any other car there shouldn't be a problem.

cali yaris · 09-29-2007, 12:54 PM

better to change your oil at a dealer or shop anyway, unless you have a way of safely and ethically disposing of the oil.

eTiMaGo · 09-29-2007, 12:55 PM

for making gearhead french fries?

09-26-2007, 09:48 AM	#1
Slummy View User's Garage Drives: Black LB Join Date: Aug 2006 Location: D.C. Posts: 249	Is it bad if.... Is it bad to switch from regular oil to synthetic and back again? If this is a repost sorry, I'm too lazy to do search right now.

09-26-2007, 12:41 PM	#3
PolarWhite View User's Garage Drives: '07 Polar White Hatchback Join Date: Sep 2007 Location: TEXAS Posts: 47	I cannot speak for every brand out there, but I can speak for VALVOLINE since I work for them. Our formulations are all compatible with one another. You could switch back and forth between conventional, synthetic blend or the full synthetic as much as you wanted to with no ill results. I cannot tell you if that is the same with all motor oils though. Hope that helps. __________________ '07 Polar White Liftback, 15in Alloy Wheels, Exhaust Tip, Cruise Control, Tinted Windows, TRD Valve Caps, PadsPlus Pads,

09-26-2007, 10:34 PM	#7
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	That is Bull shit.... you can go back and forth from full synthetic (most synthitic are made from mineral oils), to mineral oils, to blends... to any combonation between... anyone saying otherwise is yankin your chain __________________

09-29-2007, 12:54 PM	#9
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	better to change your oil at a dealer or shop anyway, unless you have a way of safely and ethically disposing of the oil. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

09-29-2007, 12:55 PM	#10
eTiMaGo vroom vroom View User's Garage Drives: lil red 5-door Join Date: Sep 2006 Location: Bangkok, Thailand Posts: 7,744	for making gearhead french fries? __________________ The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ...

09-26-2007, 12:27 PM	#2
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	i think it is...although i can't tell you why.

09-26-2007, 03:12 PM	#4
tsportman View User's Garage Drives: Yaris 1.8 TS Join Date: Jul 2007 Location: Belgium Posts: 15	I work in a car-parts store myself and people who tell you that you can't change from fully to half synthetic or even mineral oil live in the past. For years this had negative effects on the lubrication in the engine. It came all down to additives wich weren't compatible to one-another. In recent years everything has changed and nowadays you can put in whatever oil you want, or even mix different ones, although i think you shouldn't mix more than two oils. Keep in mind to follow the constructors advice on the viscosity ! Otherwise you will reduce engine life rapidly !

09-26-2007, 10:30 PM	#5
Slummy View User's Garage Drives: Black LB Join Date: Aug 2006 Location: D.C. Posts: 249	Thanks for the advice everyone. I did my last oil change myself (synthetic) but decided to go to the dealer and have them do it this time (regular). I think from now on I will just take it there. It doesn't cost much more, and I don t have to deal with it!

09-26-2007, 10:32 PM	#6
PetersRedYaris View User's Garage Drives: 2005 Scion xB Join Date: Nov 2006 Location: The Black Hills of South Dakota Posts: 1,059	You can switch all you want without problems.

09-29-2007, 03:25 AM	#8
CompanyXPaladin Drives: 08 Yaris 5-speed Join Date: Jul 2007 Location: SoCal Posts: 212	I can tell you its a bad idea in a car with an older engine designed to consume oil (take... a rotary (Wankel) engined RX7). In any other car there shouldn't be a problem.

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