OK to change back to dino?

novadude · Mar 23, 2003

From this forum, I realize that the new dinos do a great job at 3k intervals. Would it be OK to change from a synthetic back to a dino? Would this cause any problems in an engine that has only used synthetic for the last two oil change (3k) intervals??

I like the idea of a good oil for a low price, and shorter intervals do not bother me.

Steve S · Mar 23, 2003

danger!!!it will cause a nuclear like reaction other than that no problem.

Drew99GT · Mar 23, 2003

Yes, your engine will sieze within 5 to 10 miles

Seriosuly, I ran mobil 1 in my last car for the 1st 40,000 miles, then went back to conventional because of the cost. With my particular car, it actually ran better with pennzoil conventional.

Mike_dup1 · Mar 23, 2003

How can a car run better with a different oil?

You just think it runs better becuase your motivation is cost.

mkosem · Mar 23, 2003

maybee the penz is a lil heavier than the M1 and the car likes it better.

--Matt

Ferrari · Mar 23, 2003

quote:

Originally posted by Mike:
How can a car run better with a different oil?

Cars do run better with different oils, no doubt. My parents' Passat V6 used to run like crap with dino 15W-40, but it runs as smooth as silk with Amsoil 10W-40 AMO. The difference was huge.

novadude · Mar 23, 2003

OK guys... I know this was a dumb question.

Personally, I did not think changing back was an issue, but I did a search and found people posting some Toyota propaganda that said it was a bad thing. I just wanted more feedback.

Patman · Mar 23, 2003

quote:

Originally posted by novadude:
OK guys... I know this was a dumb question.

Personally, I did not think changing back was an issue, but I did a search and found people posting some Toyota propaganda that said it was a bad thing. I just wanted more feedback.

That's exactly what it is, propaganda. Toyota is the only car maker to state that it's unsafe to switch back to dino from synthetic, and they have zero proof to substantiate their claims that it's unadvisable to do.

Jay · Mar 23, 2003

The myth that once you use synthetic, "you can never go back to conventional" is one of the most perplexing and persistant rumors about oil around. I wonder what the thinking is behind it? If there's no backward compatibility with synthetic how could there be forward compatibility?

Drew99GT · Mar 23, 2003

My point about pennzoil dino running better was in regards to piston slap and engine noise in my 99 3.4L Grand Am.

icruse · Mar 23, 2003

Drew,
I have noticed the same thing to be true with my 93 Pontiac Grand Prix LE 3.1 V6 by changing to Pennzoil 5W30 from Mobil 1 5W30.

Good Day,
Steven

Tommy2 · Mar 25, 2003

I've had no problems changing back to dino from synthetic in my '95 Taurus SHO.
I use to use Mobil 1 10w-30 and changed to Castrol GTX 5w-30. Car seems to like it, plus, I dont hear the split second clacking noise at start-up that I use to hear with Mobil 1.

Tony M. · Mar 25, 2003

It is the same to me. I got the noise like TM said then I try my 10W30, the truck loves it.
I go to local toyota dealer, they sell only $1.49/qt of 10W30(SL). cheaper than Kmark

The guy said Toyota oil is Mobile dino oil. any one can confirm this? Some time I mixed 30% M1 with Toyota oil. It feel the same to me.

Tommy2 · Mar 26, 2003

quote:

Originally posted by Tony M.:
It is the same to me. I got the noise like TM said then I try my 10W30, the truck loves it.
I go to local toyota dealer, they sell only $1.49/qt of 10W30(SL). cheaper than Kmark

The guy said Toyota oil is Mobile dino oil. any one can confirm this? Some time I mixed 30% M1 with Toyota oil. It feel the same to me.

Yes, the Toyota motor oil is Mobil dino oil. I know because I use to work the parts department for a toyota dealership for a couple of years.

What model toyota do you have?

OK to change back to dino?

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