Dear Authors,

Thanks for your response to the reviewers' comments. Most of the comments have been addressed sufficiently.

In response to Reviewer 1’s comment #2, instead of just noting that “The mass fraction of molecular components in all three fuels used in this study can be found in Table S4” in the manuscript, I suggest incorporating the response in the revised manuscript to provide context. Please also specify the % of alkanes+alkenes vs. aromatics for F2 and F3 (based on Table S4) in the revised manuscript.

Reviewer 2 has some further comments, which I copied below.

"Abstract, line 30: “…while the semi volatile organic compounds (SVOCs)…”
Line 119: “for 1 min.” Earlier in the sentence it’s mentioned exhaust is continuously fed to the chamber, so this probably means, “with a residence time of 1 min.”? If yes, modify the sentence.
Line 120: “by” a filter-based sampler
Line 142: what types of compounds specifically “molecular components” refer to?
Line 182-183: “Zero airflow was connected to the chamber over the entire experiment to make up for the volume of air withdrawn by the instruments. To minimize the volume withdrawn, …”
Line 262: consider changing ‘benefit’ to “favor”
Line 327: Equation is usually referred to as “Eq.”

Once all these comments are addressed, the manuscript can be published in ACP.

Best,
Sally