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From synthetic to regular oil #4436843
06/20/17 02:13 PM
06/20/17 02:13 PM
Joined: Jun 2017
Posts: 1
Springville, UT
beeburrt Offline OP
beeburrt  Offline OP
Joined: Jun 2017
Posts: 1
Springville, UT
Hey y'all. I'm new here and this is my first post. I looked for a similar question and didn't see one so hopefully this hasn't already been asked.
I have a 2003 Toyota Tacoma with the 3.4 v6
I bought it from my dad and he had been running full synthetic in it.
When I got the truck I took it to the dealership for an oil change but I forgot to tell the guys there that I needed synthetic oil in it. So they did the oil change with regular oil and it wasn't until miles down the road when I realized my mistake.
So my question is: Will this hurt my motor? I figured it's too late so I don't plan on switching back but are there any suggestions on anything i can do to minimize harm?

Re: From synthetic to regular oil [Re: beeburrt] #4436845
06/20/17 02:18 PM
06/20/17 02:18 PM
Joined: Mar 2004
Posts: 21,085
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,085
Upstate NY
Welcome. There is a chance your engine will fall out in the first 50 miles. If it makes it past that, do the normal 5000 miles and change it to whatever you like.

If the owners manual says it requires synthetic, then I would change it to that soon. But its doubtful it does.

Last edited by Donald; 06/20/17 02:19 PM.

2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: From synthetic to regular oil [Re: beeburrt] #4436846
06/20/17 02:18 PM
06/20/17 02:18 PM
Joined: Feb 2014
Posts: 2,596
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,596
Canada
WWF


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Say "no" to Turbo!
Re: From synthetic to regular oil [Re: beeburrt] #4436849
06/20/17 02:25 PM
06/20/17 02:25 PM
Joined: Jun 2015
Posts: 4,404
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,404
New England
Should be no issue at all, even if Toyota recommended synthetic for that engine one change with conventional will likely be quite safe.
Synthetic and conventional oils can be mixed without issue, note that many manufacturers sell synthetic blends that are exactly such mixes.
Many quick change shop employees will swear that you can't run conventional after synthetic, but it's just not true...


2014 Forester XT, 90000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: From synthetic to regular oil [Re: Virtus_Probi] #4436854
06/20/17 02:34 PM
06/20/17 02:34 PM
Joined: Nov 2008
Posts: 3,274
Oshawa, Ontario Canada
JC1 Online content
JC1  Online Content
Joined: Nov 2008
Posts: 3,274
Oshawa, Ontario Canada
You'll be fine.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: From synthetic to regular oil [Re: beeburrt] #4436871
06/20/17 02:55 PM
06/20/17 02:55 PM
Joined: Jun 2017
Posts: 147
Waco, Tx.
Syntheticuser Offline
Syntheticuser  Offline
Joined: Jun 2017
Posts: 147
Waco, Tx.
Run it for 4k miles or so then change it. I would however, check the oil few times along the way. Don't be surprised if it uses some. Sometimes when you switch brands you may notice consumption. I would guess it has to do with additive changes. It usually settles down in a change or two. The inner me says oh Jesus, get that stuff out of there. Lol. I've been a synthetic fluids user since I started changing oil at 14, I'm 31 now.

Re: From synthetic to regular oil [Re: Syntheticuser] #4436901
06/20/17 03:33 PM
06/20/17 03:33 PM
Joined: Mar 2004
Posts: 21,085
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,085
Upstate NY
Originally Posted By: Syntheticuser
Run it for 4k miles or so then change it. I would however, check the oil few times along the way. Don't be surprised if it uses some. Sometimes when you switch brands you may notice consumption. I would guess it has to do with additive changes. It usually settles down in a change or two. The inner me says oh Jesus, get that stuff out of there. Lol. I've been a synthetic fluids user since I started changing oil at 14, I'm 31 now.


I have been using synthetic oil since 1976 when I got a real job. Before that I was college broke and used what oil my Dad had in cases.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: From synthetic to regular oil [Re: beeburrt] #4436930
06/20/17 04:04 PM
06/20/17 04:04 PM
Joined: Nov 2011
Posts: 4,961
MTL, CANADA
Rolla07 Offline
Rolla07  Offline
Joined: Nov 2011
Posts: 4,961
MTL, CANADA
All good with conventional oil. Follow the oil change schedule per manual and you will be good for many, many miles. Pretty sure it was recommended to use conventional to start with.


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: From synthetic to regular oil [Re: beeburrt] #4436942
06/20/17 04:11 PM
06/20/17 04:11 PM
Joined: Jun 2017
Posts: 147
Waco, Tx.
Syntheticuser Offline
Syntheticuser  Offline
Joined: Jun 2017
Posts: 147
Waco, Tx.
Dang Donald, you are old! grin

Re: From synthetic to regular oil [Re: Syntheticuser] #4437029
06/20/17 06:13 PM
06/20/17 06:13 PM
Joined: Mar 2004
Posts: 21,085
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,085
Upstate NY
Originally Posted By: Syntheticuser
Dang Donald, you are old! grin


Yes, but my brother is always 2 years older than I except for a few months when he is 3 yrs.

But only as old as you feel. I still drag my butt under the cars to change oil myself.

Waiting until my wife has 30 yrs in with NYS then retire.

And syntheticuser, my younger daughter is older than you. Married with 2 kids.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: From synthetic to regular oil [Re: beeburrt] #4437051
06/20/17 06:56 PM
06/20/17 06:56 PM
Joined: Sep 2015
Posts: 6,071
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,071
Kalifornia Kollective
Geez guys, I had my first real job in the 1960's ... You'all are all kids to me laugh

To the OP's question - all oils are blends. True synthetics do not mix well with most common additive packages, so the refiners have to have some dino oil as a carrier for the ad pak. That means even the most "synthetic" of the regularly store shelf oils are really blends.

In the last few years, Pennzoil Yellow Bottle (traditional, I know, they are all yellow now) was made form a high dose of GTL. Never advertised as such, but it was there for a long while as they ramped up and GTL oversupply. SO if you had gotten that as "regular oil" you would have actually gotten a pretty sophisticated syn-blend.

The bottom line is the motor will not care. Good oil is good oil. Dino, Syn, Blend - they all work.

Before we can really comment, you need to tell us what exact oil they used ...

Last edited by BrocLuno; 06/20/17 07:03 PM.

Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: From synthetic to regular oil [Re: beeburrt] #4437062
06/20/17 07:03 PM
06/20/17 07:03 PM
Joined: Dec 2006
Posts: 19,104
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 19,104
Dallas,Tx USA
I'm still a hot young stud at 48 laugh


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 5W20


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