Royal Purple 5w-20 in an Acura RSX Type S

[hondaintegratypes]

The Type S calls for a 30 wt oil.

Royal Purple 5w-20 was accidently put into the engine. I do not know the HTHS behind this particular viscosity, because the info. in the stickied thread above does not list HTHS for Royal Purple.

I do know that Royal Purple is either group IV or V.

Question: Will the engine be fine? The viscosity at 100C for this oil is 8.4cSt. Thanks.

 

[sbc350gearhead]

Run the RP, do a UOA and find out.

20 weights usually perform well........sometimes in engines that call for a 30 weight.

 

[hondaintegratypes]

nice..thank u

 

[Mr Nice]

No need to worry. I wouldn't change the oil just because you put the wrong weight oil in your RSX. I agree with SBC350, do a UOA around 6000 miles to see how well it is doing.

 

[Ken4]

You will be fine. RP is Group IV PAO base but carrier oil is Group I or II. Dont go beyond 6k miles.

 

[Idrinkmotoroil]

I personally wouldn't run it, the extra wear wouldn't be worth chancing it IMO, the cost of dumping the new oil wouldn't be an issue for me. As you know Acura spec'd 5w-30 for the RSX Type S, vs. 5w-20 for the base RSX, they did that for a reason due to wear concerns of the high revving vtec system. No high revving (8,000 rpms) real vtec engine spec's a 20 weight oil in Honda's lineup, and they were one of the leaders in the 20 weight field. That should tell you something. I'm not saying that the 5w-20 would kill the engine, but to me it just wouldn't be worth risking, that is a great engine and I'd want to keep it protected to the max, rather than treat it like a guinea pig.

 

[goodvibes]

You could always add a bottle of synpower and become a 30 weight with lots of adds.

 

[noob]

quote:

---

Originally posted by Idrinkmotoroil:
I personally wouldn't run it, the extra wear wouldn't be worth chancing it IMO, the cost of dumping the new oil wouldn't be an issue for me. As you know Acura spec'd 5w-30 for the RSX Type S, vs. 5w-20 for the base RSX, they did that for a reason due to wear concerns of the high revving vtec system. No high revving (8,000 rpms) real vtec engine spec's a 20 weight oil in Honda's lineup, and they were one of the leaders in the 20 weight field. That should tell you something. I'm not saying that the 5w-20 would kill the engine, but to me it just wouldn't be worth risking, that is a great engine and I'd want to keep it protected to the max, rather than treat it like a guinea pig.

---

Uh, they spec'd 5w30 dino oil for the Type-S. Are you seriously trying to claim that Amsoil fully-synthetic 5w20 won't protect as well or better than the lowest-quality 5w30 dino oil over the OCI recommended by the manual? LOL

 

[LarryL]

It's simple, use the right viscosity oil. What do you know that Honda does not know? I think Honda is pretty clear about what they want. And as far as that comment about the wrong viscosity Amsoil being better than the correct viscosity crummy dyno oil, don't be disappointed if some say the answer is no.

 

[mechtech]

So a dino that shears down to a 20 weight in 1000 miles is OK, but a full synth 20 weight that doesn't shear is bad?
20=20

 

[Fred Bear]

My 97 Accord calls for 5W-30, I have been running 20 weight for 18 months or so...(M1 0-20 and now 5w-20)UOA's are great. Dont worry and drive fast.

 

[Bror Jace]

hondaintegratypes, I wouldn't go too long with this stuff ... and I wouldn't use it again without a good UOA showing acceptable wear.

--- Bror Jace

 

[thedawk]

quote:

---

Originally posted by Bror Jace:
hondaintegratypes, I wouldn't go too long with this stuff ... and I wouldn't use it again without a good UOA showing acceptable wear.

--- Bror Jace

---

I agree. The 20w will probably be all right for a short period but you'll never know for sure without UOAs.

 

[hondaintegratypes]

quote:

---

Originally posted by noob:

quote:

---

Originally posted by Idrinkmotoroil:
I personally wouldn't run it, the extra wear wouldn't be worth chancing it IMO, the cost of dumping the new oil wouldn't be an issue for me. As you know Acura spec'd 5w-30 for the RSX Type S, vs. 5w-20 for the base RSX, they did that for a reason due to wear concerns of the high revving vtec system. No high revving (8,000 rpms) real vtec engine spec's a 20 weight oil in Honda's lineup, and they were one of the leaders in the 20 weight field. That should tell you something. I'm not saying that the 5w-20 would kill the engine, but to me it just wouldn't be worth risking, that is a great engine and I'd want to keep it protected to the max, rather than treat it like a guinea pig.

---

Uh, they spec'd 5w30 dino oil for the Type-S. Are you seriously trying to claim that Amsoil fully-synthetic 5w20 won't protect as well or better than the lowest-quality 5w30 dino oil over the OCI recommended by the manual? LOL

---

you have a point here.

i'm sure that a 20 wt synthetic with high shear stability will do just fine.

 

[Jay]

Honda specs 5w-30 for the Type-S because of oil consumption issues with 5w-20. I've seen UOAs on the K20A2 engine with oil thinned by fuel dilution to 20-weight, and the wear metals are fine. Your own UOAs with M1 0w-30 (HTHS 2.9) were excellent.

If you can live with the extra oil consumption, do nothing. Otherwise, wait till you burn down a qt or so then top up with thicker oil.

 

[hondaintegratypes]

Thanks Jay! Long time no chat..